This document outlines requirements for testing main and auxiliary steering gear before departure, including operating all components and controls. It also requires emergency steering drills every 3 months to practice procedures. Officers must be trained in steering gear operation and maintenance, and records must be kept of tests and drills conducted. Ships on short voyages may have reduced testing requirements of at least once a week.
The document describes Thrustmaster's Portable Dynamic Positioning System (PDPS), which allows vessels to be quickly converted to dynamically positioned vessels without extensive modifications. The PDPS consists of modular deck-mounted azimuthing thrusters, hydraulic power units, and a DP control van. It offers flexibility in sizing and can be installed dockside to upgrade vessels for offshore operations in deeper waters. The modular design allows configurations from 225kW to 2250kW with options for different DP class levels and controls.
Thrustmaster manufactures hydraulic outboard propulsion units for use in brown water applications. Their units include integrated and modular deck-mounted models with 360-degree steering, hydraulic tilt, and optional depth adjustment. Common applications include barges, ferries, dredges, and vessels used for maintenance, construction, and cleanup. The units are self-contained and can be quickly installed to provide maneuverability without requiring modifications to the vessel.
The document provides details about coil tubing operations for hydraulic fracturing conducted by Steffones K at Essar Oil Limited in India. It describes the key components of a coil tubing unit including the reel, control cabin, injector head and well control equipment. It also discusses coil tubing string design, bottom hole assembly design and the procedural analysis of fracturing operations using coil tubing. The aim of hydraulic fracturing and the process is briefly outlined.
This document provides an overview of rig operations and equipment used in drilling wells. It describes the personnel involved in drilling, including the tool pusher, driller, derrick worker, and floor workers. It then explains the major surface and subsurface equipment used, including the hoisting system, drawworks, block and tackle, drilling line, mud circulation system, rotary system, and mud pumps. Finally, it discusses different types of rigs and factors considered when selecting a rig, such as water depth, load capacity, and stability.
Thrustmaster is a leading manufacturer of marine thrusters in the US, producing thrusters in a variety of configurations including tunnel thrusters. Thrustmaster hydraulic tunnel thrusters consist of a fixed pitch propeller coupled to a podded hydraulic motor, providing infinite speed control. They are simple, efficient, reliable propulsion units that are well-suited for maneuvering vessels in challenging marine conditions.
Seawind is developing an innovative 6.2 MW offshore wind turbine system that can be fully assembled and installed without heavy cranes. The two-bladed turbine integrates with self-installing support structures to allow assembly at harbor and installation by simple tug boats. This novel approach aims to significantly reduce offshore wind costs by simplifying installation and maintenance compared to adapting three-bladed onshore designs.
This document provides an overview of the key components and systems on a rotary drilling rig, including:
- The power system, which typically includes 1-3 diesel engines providing 1,000-3,000 hp of power to run systems like the hoisting system and rotary table.
- The hoisting system, which uses a drawworks powered by the engines to control the drilling line via a block and tackle system for raising/lowering the drill string and other equipment.
- Calculations for determining the mechanical advantage and efficiency of the block and tackle system based on factors like pulley efficiency, number of lines, and the ideal mechanical advantage provided by the number of lines.
The document describes Thrustmaster's Portable Dynamic Positioning System (PDPS), which allows vessels to be quickly converted to dynamically positioned vessels without extensive modifications. The PDPS consists of modular deck-mounted azimuthing thrusters, hydraulic power units, and a DP control van. It offers flexibility in sizing and can be installed dockside to upgrade vessels for offshore operations in deeper waters. The modular design allows configurations from 225kW to 2250kW with options for different DP class levels and controls.
Thrustmaster manufactures hydraulic outboard propulsion units for use in brown water applications. Their units include integrated and modular deck-mounted models with 360-degree steering, hydraulic tilt, and optional depth adjustment. Common applications include barges, ferries, dredges, and vessels used for maintenance, construction, and cleanup. The units are self-contained and can be quickly installed to provide maneuverability without requiring modifications to the vessel.
The document provides details about coil tubing operations for hydraulic fracturing conducted by Steffones K at Essar Oil Limited in India. It describes the key components of a coil tubing unit including the reel, control cabin, injector head and well control equipment. It also discusses coil tubing string design, bottom hole assembly design and the procedural analysis of fracturing operations using coil tubing. The aim of hydraulic fracturing and the process is briefly outlined.
This document provides an overview of rig operations and equipment used in drilling wells. It describes the personnel involved in drilling, including the tool pusher, driller, derrick worker, and floor workers. It then explains the major surface and subsurface equipment used, including the hoisting system, drawworks, block and tackle, drilling line, mud circulation system, rotary system, and mud pumps. Finally, it discusses different types of rigs and factors considered when selecting a rig, such as water depth, load capacity, and stability.
Thrustmaster is a leading manufacturer of marine thrusters in the US, producing thrusters in a variety of configurations including tunnel thrusters. Thrustmaster hydraulic tunnel thrusters consist of a fixed pitch propeller coupled to a podded hydraulic motor, providing infinite speed control. They are simple, efficient, reliable propulsion units that are well-suited for maneuvering vessels in challenging marine conditions.
Seawind is developing an innovative 6.2 MW offshore wind turbine system that can be fully assembled and installed without heavy cranes. The two-bladed turbine integrates with self-installing support structures to allow assembly at harbor and installation by simple tug boats. This novel approach aims to significantly reduce offshore wind costs by simplifying installation and maintenance compared to adapting three-bladed onshore designs.
This document provides an overview of the key components and systems on a rotary drilling rig, including:
- The power system, which typically includes 1-3 diesel engines providing 1,000-3,000 hp of power to run systems like the hoisting system and rotary table.
- The hoisting system, which uses a drawworks powered by the engines to control the drilling line via a block and tackle system for raising/lowering the drill string and other equipment.
- Calculations for determining the mechanical advantage and efficiency of the block and tackle system based on factors like pulley efficiency, number of lines, and the ideal mechanical advantage provided by the number of lines.
The document discusses key terms and reference frames used in propeller geometry and testing. It defines global and local reference frames, including the propeller reference line and generator line. It describes propeller blade features like face, back, leading edge, and trailing edge. It also defines pitch types and other geometric properties like skew, rake, and outlines. Finally, it provides details on model ship resistance testing and open water propeller tests conducted in towing tanks.
Wärtsilä New Generation Rectractable ThrustersWärtsilä
Wärtsilä new retractable thrusters offer a high level of power level which is particularly important for the harbour manoeuvring and docking of large ships, and for dynamic positioning of offshore vessels working in heavy sea conditions.
This document provides an overview of the power and hoisting systems used on rotary drilling rigs. It discusses the typical components of a rig's power system, including diesel engines that provide mechanical or electric power. It also details the components that make up the hoisting system, including the derrick, drawworks, block and tackle pulley system, and their functions in raising and lowering equipment in the well. The block and tackle provides mechanical advantage to reduce the load on the drawworks. Formulas are provided to calculate the fast line force required to lift a weight and the load distribution throughout the rig.
This document defines and describes various components used on a drilling rig. It includes definitions of components like the gin pole, water table, crown block, derrick, stand, monkey board, racking fingers, drawworks, kelly, rotary, slips, elevators, bails, hook, and more. It provides details on things like the types of derricks, functions of various drawworks components, and mud pumps.
This document provides guidance for selecting hydraulic turbines and governing systems for hydroelectric projects up to 25 MW. It discusses key site data needed for selection, including net head values. It then classifies and describes the main turbine types - Francis, propeller, Kaplan, and impulse turbines. Selection criteria are outlined based on site parameters like head and flow. Guidelines are provided for selecting turbines for different size ranges from micro-hydro to larger mini and small hydro projects. Performance parameters like efficiency, operating ranges, and cavitation characteristics are also covered. The document concludes with sections on governing systems and examples.
Use the last few glossary slides.
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Rigs, drilling systems, well control, drilling equipment
Qazma qurğuları, qazma sistemləriç quyuya nəzarət, qazma avadanlığı
This document contains a pre-school exercise book for well control with 769 pages of content across multiple sections. The introduction explains that the exercises were designed to help prepare students for well control school by providing up-to-date self-study questions with answers in the back. Section A contains questions about well control equipment, including blowout preventers, diverters, control systems and their components. Further sections cover topics like causes of kicks, kick indications, shut-in procedures, and example kick scenarios. Formulas for well control calculations are also included at the end.
This document provides information about the Yamaha RMAX helicopter and its use for spraying applications in a research project with UC Davis. It describes the RMAX's dimensions and performance specifications, including a 141 lb dry weight, 10 ft main rotor diameter, and a 246 cc, 21 hp 2-stroke engine. The document outlines operational guidelines for daylight, low altitude use within line of sight of a certified pilot and spotter. It discusses the UC Davis project which found the RMAX could cover 10 times more acres per hour than a tractor for spraying, with benefits like improved safety and efficiency, reduced soil compaction, and lower chemical usage and exposure levels.
1) There are currently no internationally agreed upon stability requirements specifically for anchor handling tug supply (AHTS) vessels.
2) After the 2007 accident of the AHTS Bourbon Dolphin, initiatives were taken to improve design, operations, and stability requirements for AHTS vessels, including guidelines from the Norwegian Maritime Directorate.
3) The guidelines from the Norwegian Maritime Directorate propose criteria for limiting the heeling moment on AHTS vessels during anchor handling operations based on the angle of heel equivalent to 50% of the maximum GZ, the angle of flooding of the work deck, or 15 degrees, whichever is smallest.
An autopilot is a navigational device that automatically steers a ship or aircraft along a steady course. It works by receiving input on the desired course from devices like a GPS and then using actuators to control the rudder to maintain that heading. The main modes of an autopilot are manual, where the user controls steering, auto where the autopilot maintains the current course, and GPS mode where it follows a route from a GPS unit. Understanding how an autopilot works helps ensure safe navigation at sea.
This document describes various equipment used in deepwater drilling rigs and equipment selection. It discusses components of the drilling riser system such as the diverter, spider/gimbal, flex joints, tensioning ring, and their functions. It provides information on riser connectors and coupling classes. Components below the riser like the BOP connector and wellhead connector are also outlined. Technical specifications for items like pressure rating, load capacity, and angular deflection of flex joints are provided.
This document provides information about the Drilling Engineering course for Fall 2012 taught by Tan Nguyen. It includes details about the class such as time, location and materials. It also outlines the grading breakdown and lists the main topics that will be covered in the course such as rotary drilling, drilling fluids, bits, and well control. Additionally, it describes the main components of a drilling rig including the power system, hoisting system, and circulating system.
This document discusses gyrostabilizers, which are devices used to reduce ship rolling through gyroscopic principles. It describes how gyrostabilizers work by using a spinning flywheel that creates stabilizing torque in response to ship rolling. The summary discusses key differences in gyrostabilizer designs, including whether they use natural or driven precession and active or passive precession control. It also summarizes the testing process and results for a VEEM Gyro 120 model, finding it can generate up to 120kNm of stabilizing torque and significantly reduce ship rolling. In conclusion, gyrostabilizers provide stabilization without appendages prone to damage, less noise, and easier installation compared to other stabilization methods.
The document provides details about wheel slide protection (WSP) systems used on Indian Railways. It describes the working principle of WSP, which uses speed sensors and a microprocessor to monitor wheel speeds during braking and control dump valves to adjust brake cylinder pressure if wheels start sliding. The document focuses on the WSP systems supplied by Faiveley and Knorr Bremse, outlining their key components, testing procedures, and troubleshooting guidelines.
This document provides an overview of automatic control fundamentals and steering gear systems from lectures given by Eng. Yasser Bayoumy at the Institute of Maritime Upgrading Studies. It discusses open and closed-loop control systems, proportional, derivative, and PID control, and applications to ship steering gear including modes of operation for follow-up and non-follow-up control. Diagrams are included to illustrate hydraulic and electrical telemotor systems, actuators, and components of a typical steering gear system including pumps, control valves, cylinders, and relief valves.
This document discusses the key systems of a rotary drilling rig, including the power system. It explains that the power system provides power to all other rig systems, including hoisting, circulation, and rotary systems. Diesel engines are typically used to power the drawworks and rotary table. The document discusses power requirements, classifications of power systems, power supply components, and calculations for determining output power and efficiency.
The document summarizes information about subsea manifolds used in offshore oil and gas production systems. It describes how manifolds gather production fluids from wells via rigid spools and transfer them to FPSOs via flowlines and risers. It provides details about manifold types, components, design considerations regarding loads, piping, and interfaces with other subsea infrastructure. The document also references international standards for subsea production system design and operation.
This document provides maintenance instructions for air suspension systems used on Indian Railways coaches. It describes the working principle of pneumatic suspension and its advantages over coil suspension. It includes details on the construction and components of air springs, as well as the schematic layout of the pneumatic suspension control equipment. Procedures are provided for inspection, maintenance and repair of air springs, pipes, and related components. Guidelines are also given for adjusting bogie clearances and buffer coupler heights when using air suspension.
Air springs use compressed air inside a rubber bellow to provide suspension for coaches. This allows the coach to maintain a constant height regardless of passenger load. Air springs were introduced for hybrid coaches because heavy passenger loads would compress main springs and damage coil springs, compromising passenger comfort. The air spring system uses a height monitoring valve to add or release air as needed to maintain the required buffer height. When loads change, the air spring initially adjusts its distance from the coach body and then the valve adjusts air pressure until the proper height is reached. Maintenance of the air spring system requires trained staff and spare parts available at stations.
Hydraulic cylinders are linear actuators that convert hydraulic pressure into mechanical force and motion. There are several types of cylinders including single-acting, double-acting, and telescopic cylinders. Single-acting cylinders produce force in one direction only, while double-acting cylinders can produce force in both extension and retraction using ports on both sides of the piston. Telescopic cylinders extend in stages to provide a long stroke length and short retracted length. Cushioning devices are often used on cylinders to control the rate of deceleration and prevent shock at the end of the piston stroke.
STEERING GEAR MECHANISMS (kinematics of machines)Jeet Amrutiya
The steering gear mechanism turns the front wheels of a vehicle to change its direction while keeping the back wheels straight. An Ackerman steering gear is an exact mechanism that fulfills the steering condition to avoid skidding by ensuring the front wheels turn about the same instantaneous center, which lies on the axis of the fixed back wheels. Compared to the Davis mechanism, the Ackerman mechanism has the whole steering assembly behind the front wheels rather than in front, and uses turning pairs rather than sliding pairs.
The document discusses key terms and reference frames used in propeller geometry and testing. It defines global and local reference frames, including the propeller reference line and generator line. It describes propeller blade features like face, back, leading edge, and trailing edge. It also defines pitch types and other geometric properties like skew, rake, and outlines. Finally, it provides details on model ship resistance testing and open water propeller tests conducted in towing tanks.
Wärtsilä New Generation Rectractable ThrustersWärtsilä
Wärtsilä new retractable thrusters offer a high level of power level which is particularly important for the harbour manoeuvring and docking of large ships, and for dynamic positioning of offshore vessels working in heavy sea conditions.
This document provides an overview of the power and hoisting systems used on rotary drilling rigs. It discusses the typical components of a rig's power system, including diesel engines that provide mechanical or electric power. It also details the components that make up the hoisting system, including the derrick, drawworks, block and tackle pulley system, and their functions in raising and lowering equipment in the well. The block and tackle provides mechanical advantage to reduce the load on the drawworks. Formulas are provided to calculate the fast line force required to lift a weight and the load distribution throughout the rig.
This document defines and describes various components used on a drilling rig. It includes definitions of components like the gin pole, water table, crown block, derrick, stand, monkey board, racking fingers, drawworks, kelly, rotary, slips, elevators, bails, hook, and more. It provides details on things like the types of derricks, functions of various drawworks components, and mud pumps.
This document provides guidance for selecting hydraulic turbines and governing systems for hydroelectric projects up to 25 MW. It discusses key site data needed for selection, including net head values. It then classifies and describes the main turbine types - Francis, propeller, Kaplan, and impulse turbines. Selection criteria are outlined based on site parameters like head and flow. Guidelines are provided for selecting turbines for different size ranges from micro-hydro to larger mini and small hydro projects. Performance parameters like efficiency, operating ranges, and cavitation characteristics are also covered. The document concludes with sections on governing systems and examples.
Use the last few glossary slides.
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Rigs, drilling systems, well control, drilling equipment
Qazma qurğuları, qazma sistemləriç quyuya nəzarət, qazma avadanlığı
This document contains a pre-school exercise book for well control with 769 pages of content across multiple sections. The introduction explains that the exercises were designed to help prepare students for well control school by providing up-to-date self-study questions with answers in the back. Section A contains questions about well control equipment, including blowout preventers, diverters, control systems and their components. Further sections cover topics like causes of kicks, kick indications, shut-in procedures, and example kick scenarios. Formulas for well control calculations are also included at the end.
This document provides information about the Yamaha RMAX helicopter and its use for spraying applications in a research project with UC Davis. It describes the RMAX's dimensions and performance specifications, including a 141 lb dry weight, 10 ft main rotor diameter, and a 246 cc, 21 hp 2-stroke engine. The document outlines operational guidelines for daylight, low altitude use within line of sight of a certified pilot and spotter. It discusses the UC Davis project which found the RMAX could cover 10 times more acres per hour than a tractor for spraying, with benefits like improved safety and efficiency, reduced soil compaction, and lower chemical usage and exposure levels.
1) There are currently no internationally agreed upon stability requirements specifically for anchor handling tug supply (AHTS) vessels.
2) After the 2007 accident of the AHTS Bourbon Dolphin, initiatives were taken to improve design, operations, and stability requirements for AHTS vessels, including guidelines from the Norwegian Maritime Directorate.
3) The guidelines from the Norwegian Maritime Directorate propose criteria for limiting the heeling moment on AHTS vessels during anchor handling operations based on the angle of heel equivalent to 50% of the maximum GZ, the angle of flooding of the work deck, or 15 degrees, whichever is smallest.
An autopilot is a navigational device that automatically steers a ship or aircraft along a steady course. It works by receiving input on the desired course from devices like a GPS and then using actuators to control the rudder to maintain that heading. The main modes of an autopilot are manual, where the user controls steering, auto where the autopilot maintains the current course, and GPS mode where it follows a route from a GPS unit. Understanding how an autopilot works helps ensure safe navigation at sea.
This document describes various equipment used in deepwater drilling rigs and equipment selection. It discusses components of the drilling riser system such as the diverter, spider/gimbal, flex joints, tensioning ring, and their functions. It provides information on riser connectors and coupling classes. Components below the riser like the BOP connector and wellhead connector are also outlined. Technical specifications for items like pressure rating, load capacity, and angular deflection of flex joints are provided.
This document provides information about the Drilling Engineering course for Fall 2012 taught by Tan Nguyen. It includes details about the class such as time, location and materials. It also outlines the grading breakdown and lists the main topics that will be covered in the course such as rotary drilling, drilling fluids, bits, and well control. Additionally, it describes the main components of a drilling rig including the power system, hoisting system, and circulating system.
This document discusses gyrostabilizers, which are devices used to reduce ship rolling through gyroscopic principles. It describes how gyrostabilizers work by using a spinning flywheel that creates stabilizing torque in response to ship rolling. The summary discusses key differences in gyrostabilizer designs, including whether they use natural or driven precession and active or passive precession control. It also summarizes the testing process and results for a VEEM Gyro 120 model, finding it can generate up to 120kNm of stabilizing torque and significantly reduce ship rolling. In conclusion, gyrostabilizers provide stabilization without appendages prone to damage, less noise, and easier installation compared to other stabilization methods.
The document provides details about wheel slide protection (WSP) systems used on Indian Railways. It describes the working principle of WSP, which uses speed sensors and a microprocessor to monitor wheel speeds during braking and control dump valves to adjust brake cylinder pressure if wheels start sliding. The document focuses on the WSP systems supplied by Faiveley and Knorr Bremse, outlining their key components, testing procedures, and troubleshooting guidelines.
This document provides an overview of automatic control fundamentals and steering gear systems from lectures given by Eng. Yasser Bayoumy at the Institute of Maritime Upgrading Studies. It discusses open and closed-loop control systems, proportional, derivative, and PID control, and applications to ship steering gear including modes of operation for follow-up and non-follow-up control. Diagrams are included to illustrate hydraulic and electrical telemotor systems, actuators, and components of a typical steering gear system including pumps, control valves, cylinders, and relief valves.
This document discusses the key systems of a rotary drilling rig, including the power system. It explains that the power system provides power to all other rig systems, including hoisting, circulation, and rotary systems. Diesel engines are typically used to power the drawworks and rotary table. The document discusses power requirements, classifications of power systems, power supply components, and calculations for determining output power and efficiency.
The document summarizes information about subsea manifolds used in offshore oil and gas production systems. It describes how manifolds gather production fluids from wells via rigid spools and transfer them to FPSOs via flowlines and risers. It provides details about manifold types, components, design considerations regarding loads, piping, and interfaces with other subsea infrastructure. The document also references international standards for subsea production system design and operation.
This document provides maintenance instructions for air suspension systems used on Indian Railways coaches. It describes the working principle of pneumatic suspension and its advantages over coil suspension. It includes details on the construction and components of air springs, as well as the schematic layout of the pneumatic suspension control equipment. Procedures are provided for inspection, maintenance and repair of air springs, pipes, and related components. Guidelines are also given for adjusting bogie clearances and buffer coupler heights when using air suspension.
Air springs use compressed air inside a rubber bellow to provide suspension for coaches. This allows the coach to maintain a constant height regardless of passenger load. Air springs were introduced for hybrid coaches because heavy passenger loads would compress main springs and damage coil springs, compromising passenger comfort. The air spring system uses a height monitoring valve to add or release air as needed to maintain the required buffer height. When loads change, the air spring initially adjusts its distance from the coach body and then the valve adjusts air pressure until the proper height is reached. Maintenance of the air spring system requires trained staff and spare parts available at stations.
Hydraulic cylinders are linear actuators that convert hydraulic pressure into mechanical force and motion. There are several types of cylinders including single-acting, double-acting, and telescopic cylinders. Single-acting cylinders produce force in one direction only, while double-acting cylinders can produce force in both extension and retraction using ports on both sides of the piston. Telescopic cylinders extend in stages to provide a long stroke length and short retracted length. Cushioning devices are often used on cylinders to control the rate of deceleration and prevent shock at the end of the piston stroke.
STEERING GEAR MECHANISMS (kinematics of machines)Jeet Amrutiya
The steering gear mechanism turns the front wheels of a vehicle to change its direction while keeping the back wheels straight. An Ackerman steering gear is an exact mechanism that fulfills the steering condition to avoid skidding by ensuring the front wheels turn about the same instantaneous center, which lies on the axis of the fixed back wheels. Compared to the Davis mechanism, the Ackerman mechanism has the whole steering assembly behind the front wheels rather than in front, and uses turning pairs rather than sliding pairs.
This document discusses steering mechanisms for vehicles. It describes the condition for true rolling as having an instantaneous center where the front wheel axes meet the rear axis when turning. This requires the inner wheel to turn through a greater angle than the outer wheel. The main types of steering mechanisms are the Ackerman and Davis systems. The Ackerman mechanism is most widely used due to its simplicity and ability to achieve true rolling through an instantaneous center point between the wheel axes. It has turning pairs behind the wheels while the Davis mechanism has sliding pairs in front of the wheels and is more prone to wear.
The document provides an overview of shaft lateral analysis. It discusses:
1) Performing shaft alignment calculations and positioning bearings to fulfill loading criteria.
2) Modeling the shaft system accounting for loads and thermal expansion.
3) Analyzing shaft deflection, stresses, and ensuring adequate lubrication film thickness.
4) Verifying bearing loads are within criteria and seals/components are compatible.
5) Describing bearing positioning using the reliable GAP/SAG method within tolerances.
This document discusses steering gear mechanisms used in vehicles. It introduces the basic principles of steering mechanisms, including that the front wheels turn to change the vehicle's direction while the back wheels remain straight. It describes two common steering mechanisms: Ackermann steering uses linkages to ensure the inside and outside wheels follow different radius circles during a turn. Davis steering is also an exact mechanism but has more sliding components, increasing wear and reducing accuracy compared to Ackermann steering. The key difference between the mechanisms is that Ackermann steering is behind the front wheels while Davis is in front, and Ackermann uses turning pairs while Davis uses sliding pairs.
This document discusses the proper procedure for paralleling two electrical systems. Five conditions must be matched: number of phases, direction of rotation, voltage amplitudes, frequencies, and phase angles. Phase rotation refers to whether the phases rotate clockwise or counterclockwise, and must be the same between systems. Phase angle refers to the timing of the voltage waveforms, which must be within 10 degrees of each other. The document provides examples of issues that can occur if these parameters are not properly matched, such as surges or the inability to close circuit breakers. Proper testing and verification of these parameters is necessary to safely parallel two electrical systems.
The document discusses reciprocating engine dynamic properties, including:
- Primary and secondary inertia forces arising from piston motion and how engine configurations can balance these forces.
- Torque resulting from gas pressure and piston inertia, and how these combine to produce total torque acting on the crankshaft.
- Engine excitation mechanisms in a single cylinder engine, including inertia forces, gas forcing, and equilibrium of forces.
- Key issues around balancing the masses in multi-cylinder engines to minimize free inertial forces and moments transmitted outside the engine.
An overview of remanufacturing marine componentsLee Russell
This presentation provides an overview of the different marine components which can be remanufactured
Propeller shafts
Stern seals
Rudder stocks
Stabiliser stocks
‘Z’ type drives, including outboard motors
The document discusses different types of steering gearboxes used to convert the rotary motion of a steering wheel into linear motion to turn the wheels of a vehicle. It describes 9 common types: worm and roller, worm and sector, cam and roller, reciprocating ball, rack and pinion, cam and lever, screw and nut, cam and peg, and worm and ball bearing. Each type uses different mechanical linkages and components like worms, sectors, cams, rollers, nuts, racks, pins, and balls to transfer the rotational force from the steering shaft to steering components that turn the wheels.
Three sentences summarizing the document:
The document discusses the design of marine propellers, including their basic components and nomenclature. It examines factors like the number of blades, propeller geometry, calculations for sizing a four-bladed propeller based on known values like power and ship speed. The document also evaluates the propeller's performance using non-dimensional coefficients and compares the actual efficiency to ideal theoretical models.
The document describes the operation of a four-stroke engine, including the intake, compression, power, and exhaust strokes in one revolution of the crankshaft. It also discusses the valve timing and fuel injection systems. The cooling, lubrication, and timing systems are described as well as differences between gasoline and diesel engines.
Diesel engines on ships can run on various fuels including heavy fuel oil, marine diesel oil, and intermediate fuel oil. Heavy fuel oil is stored in bunker tanks and passes through settling tanks, heaters, separators, and daily service tanks before being pumped to the engine. Marine diesel oil is stored separately and also passes through purification processes before storage and pumping to the engine. A mixing tank is used for gradual transition between fuels and includes vents for hot fuel fumes.
This document outlines the marine electrical standard requirements for electrical machinery and systems on ships. It discusses SOLAS regulations regarding main and emergency electrical power sources. Equipment like generators, circuit breakers, switchboards, cables, and motors are subject to periodic surveys to check they are maintained according to classification standards. The objectives are to understand general requirements for electrical power provision and ensure safety.
This document describes a marine energy device that uses rows of floating disks attached to horizontal shafts to harness wave energy. As waves lift and lower the disks, they turn the shafts through one-way bearings. The rotating shafts are connected to a generator to produce electricity, similar to a wind turbine. It provides calculations to estimate the average power produced by a single 10-meter diameter disk in both regular and irregular wave conditions of different heights and periods. It also introduces the linear model and equation of motion for the heaving oscillation of the floats in the system.
Gear? Where it is used and why? We know that gear is power transmitting element but there are many any elements like - rope, chain drives which can also be used. There are many benefits of using gear over belt, rope, chain drive, that's why we used gear. Here we provide a complete description about gear, types of gear. Spur gear, Helical gear, Worm gear, Bevel gear, these are some important types of gear which are described briefly with their terminology. A complete difference is clarified between all types of gear relating their shapes and position of shaft.
Hydraulics is the study of fluids at rest or in motion, especially regarding engineering applications. Hydraulic systems use pressurized fluids to gain mechanical advantage and perform work. Basic hydraulic systems include a hydraulic pump to pressurize fluid, a hydraulic motor or cylinder to use the pressurized fluid to do work, and piping to transfer fluid between components. Hydraulic systems provide convenient power transfer with few moving parts and flexibility to distribute force in multiple directions for many uses.
This document provides an overview of spur gear design, including surface durability concepts, common failure modes, and equations for calculating contact stress. It discusses Buckingham's contact stress equation and modifications made by AGMA to account for factors like velocity, overload, and load distribution. Methods for determining the surface fatigue strength of gear materials are presented. Finally, common materials used for gears like cast iron, steel, and bronze are described.
The document describes the paralleling technique for dental radiography. In the paralleling technique, the film, teeth, and aiming ring of the paralleling instrument are positioned parallel to each other. This allows the x-ray beam to be perpendicular to the film and teeth, reducing distortion. The paralleling technique provides better dimensional accuracy compared to the bisecting angle technique but is less comfortable for patients. Proper patient positioning, film selection and placement, use of paralleling instruments, and head position are described to successfully implement this technique.
This document discusses navigation and collision avoidance in restricted visibility. It outlines key rules for vessel conduct when visibility is limited, including proceeding at a safe speed and having engines ready. Parallel indexing is described as the primary method for monitoring navigation using radar to track fixed objects and course changes. The document also details the sound signals vessels must use in restricted visibility, such as one prolonged blast for power-driven vessels making way through water. Maintaining accurate position information and pre-planning routes can additionally aid safe navigation in poor conditions.
This document provides an overview of mooring and anchor handling. It discusses different types of drilling rigs that use mooring systems, including semi-submersibles and drilling vessels. The criteria for designing an anchor mooring system includes understanding the environmental forces on the rig, selecting appropriate equipment based on water depth and soil type, and ensuring the anchor has sufficient holding power. It also covers topics such as soil classification, anchor types, mooring components, inspection and certification procedures.
За короткий срок разработана презентация высокотехнологичной украинской компании «Krypton Ocean Group», которая занимается разработкой технологий по добыче полезных ископаемых в Мировом океане с помощью подводных транспортных модулей. Предназначение - презентация проекта потенциальным инвесторам.
За короткий срок разработан нестандартный буклет для высокотехнологичной украинской компании «Krypton Ocean Group», которая занимается добычей полезных ископаемых в Мировом океане с помощью подводных транспортных модулей. Предназначение - печать и презентация проекта на международной выставке.
This document discusses ship stability including definitions, types of stability, factors affecting stability, criteria for assessing stability, and procedures for evaluating stability using a ship's stability booklet and loading conditions. It provides definitions of longitudinal stability, transverse stability, equilibrium conditions, intact and damaged stability, criteria for various ship types, and procedures for assessing loading conditions and developing a ship's stability booklet.
This document summarizes the key features and capabilities of the Saipem 7000 vessel. It can handle the entire scope of offshore construction projects worldwide through its state-of-the-art J-lay tower and dynamic positioning system. It has accommodation for 725 people to assist with commissioning and platform support. Its robust specifications allow it to reliably perform conventional, deep and ultra-deep water development projects through pipe-laying in over 2,000 meters of water and lifts of up to 14,000 tons.
This document discusses safety rules and regulations regarding marine auxiliary machinery, specifically steering gear. It covers general rules established by the United Nations and IMO, as well as specific SOLAS regulations. The SOLAS rules require testing of steering gear within 12 hours of departure and emergency drills every 3 months. They also specify requirements for rudder angle and velocity, torque capacity of the steering gear, system alarms, and documentation of procedures.
this presentation will give brief idea about Drillship(Dhirubhai Deep-water KG2).And what kind of technologies are used to build this drill ship, its design,Drilling Equipment's,Draw works,Motion Compensator,Rotary Table,Top Drive,Mud pump,Shale shaker,Riser handling,BOP and subsea equipment.
The document outlines specifications for a boat outfit used to suspend current meters and samplers from a boat into bodies of water. The boat outfit must operate reliably under environmental conditions, be easy to use and maintain, and have a lifetime of at least 10 years. It consists of a crane, winch, cable that can hold up to 100kg and withstand 2000 Newtons of force, and an A-frame mounted to the boat. The cable must not induce torque on the current meter sensor.
Basic load out methodologies introductionBruce nguyen
The document provides details on the load out plan using skidding and strand jacks. It assigns responsibilities to various managers for the safe execution of the load out. The key steps include pre-ballasting the barge, installing strand jacks and anchor blocks, pre-tensioning strands, breaking out the structure, and pulling it onto the barge while coordinating with ballasting operations. Safety is the top priority, and specific responsibilities are defined for project management, supervisors, and subcontractors to ensure a safe load out.
The document outlines the responsibilities and procedures for load out of a structure weighing 13,000 metric tons by skidding. It will be pulled to a barge using strand jacks at a rate of up to 20 meters per hour. A project manager, load out manager, safety manager, and other supervisors will oversee the operation which involves pre-stressing steel strands, ballasting the barge, and carefully aligning and positioning the structure. Detailed engineering plans, safety protocols, and responsibilities of all parties are defined to ensure the load out is completed successfully and safely.
The document discusses guidelines for transmission system planning in India. It outlines that:
- The Central Electricity Authority is responsible for preparing transmission plans and coordinating planning agencies according to the Electricity Act 2003.
- The transmission system consists of the inter-state transmission system (ISTS) managed by the Central Transmission Utility and intra-state transmission systems (Inra-STS) managed by State Transmission Utilities.
- Transmission planning involves power flow studies, short circuit studies, and stability studies to ensure system security, reliability and that all parameters remain within limits under normal ('N-0') and contingency ('N-1' and 'N-1-1') conditions.
The document compares regulations for normal, utility, acrobatic, and commuter category airplanes between the Federal Aviation Regulations part 23 (FAR 23) and the Joint Aviation Requirements part 23 (JAR 23). It shows sections from FAR 23 next to the comparable sections from JAR 23 and highlights differences in applicability and requirements between the two sets of regulations. In general, JAR 23 requirements apply to smaller airplanes and commuter category airplanes where FAR 23 requirements also apply to some larger airplanes in the normal, utility, and acrobatic categories.
The document describes the operational trial process for a 1000 kW diesel alternator (DA), including tests of:
1) Automatic voltage regulator control and recovery times under different load conditions.
2) Steady state voltage levels that must be maintained within 1% for 1 second after load changes.
3) Voltage range that must be adjustable between 394V to 436V.
4) Over voltage relay settings to trip between 456V to 469V.
Additional tests described include hand voltage regulation, voltage balance between phases, governor response times to load changes, parallel generator operation requirements, and the conclusion of a training program at Garden Reach Shipbuilders & Engineers Ltd.
This document discusses procedures for operation and maintenance of electrical equipment. It outlines steps to monitor voltages, check breaker trip circuits, observe battery performance, ensure communication equipment is working, monitor transformer loading and temperatures, check diesel generators, inspect the substation yard, test gas pressures in SF6 breakers, and check additional equipment. Precautions are provided for testing procedures and limits are given for acceptable pole discrepancies when measuring circuit breaker operation times.
Centrifugation uses centrifugal force to separate particles in a sample based on density. There are three classifications of centrifuges - low-speed, high-speed, and ultra-speed - which separate particles at different rates based on revolutions per minute. Low-speed centrifuges separate things like serum from blood cells, while high-speed and ultra-speed centrifuges are needed to separate smaller and denser particles like viruses and cell organelles. Proper maintenance of centrifuges, such as lubricating bearings and replacing worn parts, is important for safety and performance.
1. The document outlines 23 performance standards that autopilot and heading control systems installed on ships must meet according to the International Maritime Organization (IMO).
2. The standards require systems to reliably maintain a preset heading under various operating conditions, incorporate controls to adjust for weather and steering performance, and allow for easy and safe operation.
3. Systems must also ensure the ship's heading can only be altered intentionally by crew, integrate properly with navigation systems, and include alarms and indications for failures or off-heading situations.
This work was carried out at Odessa Maritime Training Centre. Presentation for the research conference "Modern technologies of design, construction, operation and repair of ships, marine engineering facilities and engineering structures” held in National Shipbuilding University (Nikolayev, Ukraine).
The document discusses marine steering gear systems. It describes how rudder angle is controlled to direct a ship's movement. It explains the main parts of steering gear including the telemotor, control unit, and power unit. There are two main types of steering gear systems: hydraulic and electro-hydraulic. Ram and rotary vane types are also described. Maintenance and operational checks are outlined.
The document discusses the specifications and maintenance of a rotary vane steering gear system. It describes issues like wear on the cylindrical body and seals that can cause hunting behavior. Regular maintenance including changing oil filters and stuffing glands yearly and overhauling the entire system every 2 years is recommended. While compact and using less oil than alternatives, rotary vane systems have lower reliability due to greater wear on sealing surfaces and difficulty diagnosing vane failures.
This document discusses different types of pumps and their components, including centrifugal pumps, gear pumps, screw pumps, and mono pumps. It also describes pump bearings, noting that line bearings are used to keep the pump shaft steady and prevent damage. Common materials for line bearings include teflon, elastomers, polyester, carbon and simsite. The document outlines the characteristics of line bearings such as being self-lubricating and withstanding high temperatures and loads, as well as some disadvantages like being prone to cracking and having a high cost.
Heat exchangers transfer heat from one medium to another and come in various types. They consist of channels that separate the mediums but allow heat transfer between them. Common examples include coolers that use sea water to cool engine fluids, and heaters that use steam to heat fuels. Tubular heat exchangers are most widely used and can accommodate a variety of temperatures and pressures. Heat exchangers effectively transfer heat through processes like cooling, heating, condensing, and evaporating.
This document describes different types of valves including a manually actuated three-position valve, a four-way two-position valve, and a spring-centered three-position valve. It also discusses a typical solenoid controlled, pilot operated or two-stage valve where the pilot choke is mounted on the valve.
The document describes the central cooling system on a ship which previously used corrosive seawater but now uses a fresh water system. The fresh water system has high and low temperature circuits. The high temperature circuit pumps water from the engines to the fresh water generator and back to the pumps. The low temperature circuit then distributes this water to various auxiliaries. A temperature control valve regulates the mixture of waters to a suitable inlet temperature for the engines. The fresh water system requires less maintenance and investment than the previous seawater system but has higher initial costs and limitations during high sea temperatures.
There are several operational faults that can occur in refrigeration systems. Some of the most common include refrigerant leaks, which can be detected by low refrigerant levels or bubbles in the sight glass. Refrigerant undercharging can cause low pressures and inefficient cooling. Refrigerant overcharging can cause high pressures and short cycling. Moisture, air, or too much oil in the system can also cause issues like frosting or low heat transfer. Addressing problems like fouled condensers or restricted airflow can help prevent short cycling and efficiency losses.
This document discusses the desired properties of refrigerants and their environmental impacts. It describes how chlorofluorocarbons (CFCs) were previously used as refrigerants but deplete the ozone layer by releasing chlorine atoms when broken down by UV rays. CFCs react with ozone in the stratosphere, removing oxygen atoms and leaving it vulnerable to UV rays. Newer refrigerants like hydrofluorocarbons (HFCs) do not harm the ozone but are greenhouse gases that contribute to global warming. The document defines terms like ozone depletion potential and global warming potential used to measure environmental impacts.
Several container ships experienced damage and loss of cargo due to severe weather conditions and heavy seas over the years. Notable incidents included the Ital Florida losing containers in 2007 due to 7-10 meter high waves in the Arabian Sea, the NYK Antares losing around 52 containers in the North Sea due to severe weather, and the MSC Napoli nearly capsizing and running aground in the English Channel during a heavy storm which resulted in many container losses. Other ships like the MSC Carla, CSAV Shenzhen, OOCL America, and APL China also sustained container damage and losses from being hit by bad weather in open oceans.
Low power architecture of logic gates using adiabatic techniquesnooriasukmaningtyas
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Adaptive synchronous sliding control for a robot manipulator based on neural ...IJECEIAES
Robot manipulators have become important equipment in production lines, medical fields, and transportation. Improving the quality of trajectory tracking for
robot hands is always an attractive topic in the research community. This is a
challenging problem because robot manipulators are complex nonlinear systems
and are often subject to fluctuations in loads and external disturbances. This
article proposes an adaptive synchronous sliding control scheme to improve trajectory tracking performance for a robot manipulator. The proposed controller
ensures that the positions of the joints track the desired trajectory, synchronize
the errors, and significantly reduces chattering. First, the synchronous tracking
errors and synchronous sliding surfaces are presented. Second, the synchronous
tracking error dynamics are determined. Third, a robust adaptive control law is
designed,the unknown components of the model are estimated online by the neural network, and the parameters of the switching elements are selected by fuzzy
logic. The built algorithm ensures that the tracking and approximation errors
are ultimately uniformly bounded (UUB). Finally, the effectiveness of the constructed algorithm is demonstrated through simulation and experimental results.
Simulation and experimental results show that the proposed controller is effective with small synchronous tracking errors, and the chattering phenomenon is
significantly reduced.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
2. The main steering gear and rudder stock shall beThe main steering gear and rudder stock shall be
1. of adequate strength and capable of steering the1. of adequate strength and capable of steering the
ship at maximum ahead speed which shall beship at maximum ahead speed which shall be
demonstrated.demonstrated.
2. capable of putting the rudder from 35º on one2. capable of putting the rudder from 35º on one
side to 35º on the other side with the ship at itsside to 35º on the other side with the ship at its
deepest seagoing draught and running ahead atdeepest seagoing draught and running ahead at
maximum ahead speed and, under the samemaximum ahead speed and, under the same
conditions, from 35º on either side to 30º on theconditions, from 35º on either side to 30º on the
other side in not more than 28 secondsother side in not more than 28 seconds
3. 3. operated by power where necessary to meet3. operated by power where necessary to meet
the requirements of the paragraph 3.2 and inthe requirements of the paragraph 3.2 and in
case when the Administration requires acase when the Administration requires a
rudder stock of over 120mm diameter in wayrudder stock of over 120mm diameter in way
of the tiller, excluding strengthening forof the tiller, excluding strengthening for
navigation in ice; andnavigation in ice; and
4. so designed that they will not be damaged at4. so designed that they will not be damaged at
maximum astern speed; however, this designmaximum astern speed; however, this design
requirement need not be proved by trials atrequirement need not be proved by trials at
maximum astern speed and maximum ruddermaximum astern speed and maximum rudder
angle.angle.
4. The auxiliary steering gear shall be:The auxiliary steering gear shall be:
1. of adequate strength and capable of steering the1. of adequate strength and capable of steering the
ship at navigable speed and of being broughtship at navigable speed and of being brought
speedily into action in an emergency.speedily into action in an emergency.
2. capable of putting the rudder over from 15º on2. capable of putting the rudder over from 15º on
one side to 15º on the other side in not more thanone side to 15º on the other side in not more than
60 seconds with the ship at its deepest seagoing60 seconds with the ship at its deepest seagoing
draught and running ahead at one half of thedraught and running ahead at one half of the
maximum ahead service speed of 7 knots,maximum ahead service speed of 7 knots,
whichever is the greaterwhichever is the greater
5. 3. operated by power where necessary to meet3. operated by power where necessary to meet
the requirements of paragraph 4.2 and in anythe requirements of paragraph 4.2 and in any
case when the Administration requires acase when the Administration requires a
rudder stock of over 230mm diameter in wayrudder stock of over 230mm diameter in way
of the tiller, excluding strengthening forof the tiller, excluding strengthening for
navigation on ice.navigation on ice.
6. Main and auxiliary steering gear power unitsMain and auxiliary steering gear power units
shall beshall be
1. arranged to restart immediately when the1. arranged to restart immediately when the
power is restored after a power failure; andpower is restored after a power failure; and
2. capable of being brought into operation from a2. capable of being brought into operation from a
position on the navigation bridge. In the eventposition on the navigation bridge. In the event
of a power failure to anyone of the steeringof a power failure to anyone of the steering
gear power units, an audible and visual alarmgear power units, an audible and visual alarm
shall be given on the navigation bridge.shall be given on the navigation bridge.
7. A means of communication shall be providedA means of communication shall be provided
between the navigation bridge and the steeringbetween the navigation bridge and the steering
gear compartment.gear compartment.
8. The angular position of the rudderThe angular position of the rudder
shallshall
1. if the main steering gear is power-operated, be1. if the main steering gear is power-operated, be
indicated on the navigation bridge. The rudderindicated on the navigation bridge. The rudder
angle indication shall be independent of theangle indication shall be independent of the
steering gear control system;steering gear control system;
2. be recognizable in the steering gear compartment2. be recognizable in the steering gear compartment
9. Hydraulic power-operated steering gear shallHydraulic power-operated steering gear shall
be provided with the following:be provided with the following:
1. arrangements to maintain the cleanliness of the1. arrangements to maintain the cleanliness of the
hydraulic fluid taking into consideration the typehydraulic fluid taking into consideration the type
and design of the hydraulic system;and design of the hydraulic system;
10. 2. a low-level alarm for each hydraulic fluid reservoir to2. a low-level alarm for each hydraulic fluid reservoir to
give the earliest practicable indication of hydraulic fluidgive the earliest practicable indication of hydraulic fluid
leakage. Audible and visual alarms shall be given on theleakage. Audible and visual alarms shall be given on the
navigation bridge and in the machinery space where theynavigation bridge and in the machinery space where they
can be readily observed; andcan be readily observed; and
3. a fixed storage tank having sufficient capacity to recharge3. a fixed storage tank having sufficient capacity to recharge
at least one power actuating system including theat least one power actuating system including the
reservoir, where the main steering gear is required toreservoir, where the main steering gear is required to
power-operated. The storage tank shall be permanentlypower-operated. The storage tank shall be permanently
connected by piping in such a manner that the hydraulicconnected by piping in such a manner that the hydraulic
systems can be readily recharged from a position withinsystems can be readily recharged from a position within
the steering gear compartment and shall be provided withthe steering gear compartment and shall be provided with
a contents gauge.a contents gauge.
11. The steering gear compartmentsThe steering gear compartments
shall beshall be
1. readily accessible and, as far as practicable,1. readily accessible and, as far as practicable,
separated from machinery space; andseparated from machinery space; and
2. provided with suitable arrangements to ensure2. provided with suitable arrangements to ensure
working access to steering gear machinery andworking access to steering gear machinery and
controls. These arrangements shall includecontrols. These arrangements shall include
handrails and gratings or other non-sliphandrails and gratings or other non-slip
surfaces to ensure suitable working conditionssurfaces to ensure suitable working conditions
in the event of hydraulic fluid leakage.in the event of hydraulic fluid leakage.
12. Where the rudder stock is required to be over 230mmWhere the rudder stock is required to be over 230mm
diameter in way of the tiller, excluding strengthening fordiameter in way of the tiller, excluding strengthening for
navigation in ice, an alternative power supply, sufficientnavigation in ice, an alternative power supply, sufficient
at least to supply the steering gear power unit whichat least to supply the steering gear power unit which
complies with the requirements of paragraph 4.2 andcomplies with the requirements of paragraph 4.2 and
also its associated control system and the rudder anglealso its associated control system and the rudder angle
indicator, shall be provided automatically, within 45indicator, shall be provided automatically, within 45
seconds, either from the emergency source of electricseconds, either from the emergency source of electric
power or from an independent source of power locatedpower or from an independent source of power located
in the steering gear compartment. This independentin the steering gear compartment. This independent
source of power shall be used only for this purpose. Insource of power shall be used only for this purpose. In
every ship of 10,000 gross tonnage and upwards, theevery ship of 10,000 gross tonnage and upwards, the
alternative power supply shall have a capacity of at leastalternative power supply shall have a capacity of at least
30 minutes of continuous operation and in any other ship30 minutes of continuous operation and in any other ship
for at least 10 minutes.for at least 10 minutes.
13. Additional requirements:Additional requirements:
Means for indicating that the motors of electricMeans for indicating that the motors of electric
and electrohydraulic steering gear are runningand electrohydraulic steering gear are running
shall be installed on the navigation bridge andshall be installed on the navigation bridge and
at a suitable main machinery control position.at a suitable main machinery control position.
14. Each electric or electrohydraulic steering gearEach electric or electrohydraulic steering gear
comprising one or more power units shall becomprising one or more power units shall be
served by at least two exclusive circuits fedserved by at least two exclusive circuits fed
directly from the main switchboard; however,directly from the main switchboard; however,
one of the circuits may be supplied through theone of the circuits may be supplied through the
emergency switchboard. An auxiliary electric oremergency switchboard. An auxiliary electric or
electrohydraulic steering gear associated to oneelectrohydraulic steering gear associated to one
of the circuits supplying this main steering gear.of the circuits supplying this main steering gear.
The circuits supplying an electric orThe circuits supplying an electric or
electrohydraulic steering gear shall haveelectrohydraulic steering gear shall have
adequate rating for supplying all motors, whichadequate rating for supplying all motors, which
can be simultaneously connected to them andcan be simultaneously connected to them and
may be required to operate simultaneously.may be required to operate simultaneously.
15. Short circuit protection and an overload alarmShort circuit protection and an overload alarm
shall be provided for such circuits and motors.shall be provided for such circuits and motors.
Protection against excess current, includingProtection against excess current, including
starting current, if provided, shall be for not lessstarting current, if provided, shall be for not less
than twice the full load current of the motor orthan twice the full load current of the motor or
circuit so protected, shall be arranged to permitcircuit so protected, shall be arranged to permit
the passage of the appropriate starting currents.the passage of the appropriate starting currents.
Where a three-phase supply is used an alarmWhere a three-phase supply is used an alarm
shall be provided that will indicate failure ofshall be provided that will indicate failure of
anyone of the supply phases.anyone of the supply phases.
The alarms required is this paragraph shall beThe alarms required is this paragraph shall be
both audible and visual and shall be situated in aboth audible and visual and shall be situated in a
conspicuous position in the main machinery isconspicuous position in the main machinery is
normally controlled.normally controlled.
16. Regulation 25Regulation 25
Operation of main source of electricalOperation of main source of electrical
power and steering gearpower and steering gear
In areas where navigation demands specialIn areas where navigation demands special
caution, ships shall have more than onecaution, ships shall have more than one
steering gear power unit in operation whensteering gear power unit in operation when
such units are capable of simultaneoussuch units are capable of simultaneous
operation.operation.
18. Within 12 hours before departure, the ship'sWithin 12 hours before departure, the ship's
steering gear shall be checked and tested bysteering gear shall be checked and tested by
the ship's crew. The test procedure shallthe ship's crew. The test procedure shall
include, where applicable, the operation ofinclude, where applicable, the operation of
the following:-the following:-
1.11.1 the main steering gear;the main steering gear;
1.21.2 the auxiliary steering gear;the auxiliary steering gear;
1.31.3 the remote steering gear control systems;the remote steering gear control systems;
19. 1.41.4 the steering gear positions located on thethe steering gear positions located on the
navigation bridge;navigation bridge;
1.51.5 the emergency power supply;the emergency power supply;
1.61.6 the rudder angle indicators in relation tothe rudder angle indicators in relation to
thethe actual position of the rudder;actual position of the rudder;
1.71.7 the remote steering gear control systemthe remote steering gear control system
power failure alarms;power failure alarms;
1.81.8 the steering gear power unit failure alarms;the steering gear power unit failure alarms;
1.91.9 automatic isolating arrangements and otherautomatic isolating arrangements and other
automatic equipmentautomatic equipment
20. The checks and tests shall include:The checks and tests shall include:
2.12.1 the full movement of the rudder accordingthe full movement of the rudder according
to the required capabilities of the steeringto the required capabilities of the steering
gear;gear;
2.22.2 a visual inspection for the steering gear anda visual inspection for the steering gear and
its connecting linkage; andits connecting linkage; and
2.32.3 the operation of the means ofthe operation of the means of
communication between the navigationcommunication between the navigation
bridge and the steering gear compartment.bridge and the steering gear compartment.
21. 3.13.1 Simple operating instructions with blockSimple operating instructions with block
diagram showing the change-overdiagram showing the change-over
procedures for remote steering gear controlprocedures for remote steering gear control
systems and steering gear power units shallsystems and steering gear power units shall
permanently displayed on the navigationpermanently displayed on the navigation
bridge and in the steering compartment.bridge and in the steering compartment.
3.23.2 All ships' officers concerned with theAll ships' officers concerned with the
operation and/or maintenance of steeringoperation and/or maintenance of steering geargear
shall be familiar with the operation ofshall be familiar with the operation of thethe
steering systems fitted on the ship andsteering systems fitted on the ship and withwith
the procedures for changing from onethe procedures for changing from one
system to another.system to another.
22. 4.4. In addition to the routine checks and testsIn addition to the routine checks and tests
prescribed in paragraphs 1 and 2,prescribed in paragraphs 1 and 2,
emergency steering drills shall takeemergency steering drills shall take place atplace at
least once every three months inleast once every three months in order toorder to
practice emergency steeringpractice emergency steering procedures.procedures.
These drills shall includeThese drills shall include direct control withindirect control within
the steering gearthe steering gear compartment, thecompartment, the
communicationscommunications procedure with theprocedure with the
navigation bridge and,navigation bridge and, where applicable, thewhere applicable, the
operation ofoperation of alternative power supplies.alternative power supplies.
23. 5.5. The Administration may waive theThe Administration may waive the
requirements to carry out the checks andrequirements to carry out the checks and teststests
prescribed in paragraphs 1 and 2 forprescribed in paragraphs 1 and 2 for shipsships
which regularly engage on shortwhich regularly engage on short duration.duration.
Such ships shall carry out theseSuch ships shall carry out these checkschecks
and tests at least once a week.and tests at least once a week.
24. 6.6. The date upon which the checks and testsThe date upon which the checks and tests
prescribed in paragraph 1 and 2 are carriedprescribed in paragraph 1 and 2 are carried
out and the date and detailsout and the date and details of emergencyof emergency
steering drills carried out under paragraphsteering drills carried out under paragraph
4, shall be recorded.4, shall be recorded.
25. SummarySummary
Requirements for testing steering gear prior toRequirements for testing steering gear prior to
departure.departure.
Requirements for instructions.Requirements for instructions.
Officers competence in steering gearOfficers competence in steering gear
operation/maintenance.operation/maintenance.
Reduced requirements for ships on shortReduced requirements for ships on short
voyages.voyages.
Recording of tests and drills.Recording of tests and drills.