Aoil survey presentation

Abhay Ocean offers a complete range of Marine survey
services, including desktop studies (DTS), topographic landing
surveys, shallow-water (including diver swim) surveys, IHO
bathymetry, pre- and post-dredge, submarine cable and pipeline
route surveys, covering the whole route from landing site, near
shore to full ocean depths.
ABHAY OCEAN INDIA PVT LTD Established in 1998 at
Mumbai, by Capt. Jagdish Khokhar an ex Indian naval
officer, having over 35 years experience in managing &
executing wide variety of projects in Marine/Offshore
Services.
WWW.ABHAY-OCEAN.COM ABHAY@ABHAY-OCEAN.COM
Abhay Ocean offers a complete range of Marine survey
services, including desktop studies (DTS), topographic landing
surveys, shallow-water (including diver swim) surveys, IHO
bathymetry, pre- and post-dredge, submarine cable and pipeline
route surveys, covering the whole route from landing site, near
shore to full ocean depths.
Abhay Ocean is ready to provide customized geotechnical
services to ISO, ASTM and NGI guidelines. Our track record
includes successful projects.
We routinely utilize various overburden-sampling tools such as
vibrocoring systems, piston corers, gravity corers and grab
sampling units, as well as box samplers and ROV push-type
corers.
Abhay Ocean measures a range of oceanographic and
meteorological parameters, all of which are important both for
design and operational purposes. Oceanographic measurements
are made in water depths ranging from coastal areas to full
ocean depth.

As a part of our survey services, we Abhay Ocean provide comprehensive survey and
marine services to both offshore and onshore industry to support every stage of the
development of construction facilities.
ABHAY OCEAN’S Survey services support every stage in the development of both
onshore, offshore and near shore facilities. These include geophysical and
geotechnical investigations, bathymetry, Hydrographical survey to provide the
information required by engineers designing offshore platforms, pipelines and cables,
and to support dredging, reclamation and other near shore civil works.
Shallow seismic records are interpreted by our geophysicists to understand complex
seabed geology and sonar records are used to map seabed features that have been
identified and located during the survey.
Our engineers examine soil samples recovered from drilling operations to calculate
soil strength and perform foundation engineering studies required by the engineers
and designers of both onshore and offshore structures / constructions.
The geophysical information gathered is required prior to the design and installation
of subsea pipelines and offshore structures. Hydrographic surveys are carried out to
chart the seafloor and used for navigation or engineering, design purposes and
volume calculation for dredging activities.
As a part of our survey services, we Abhay Ocean provide comprehensive survey and
marine services to both offshore and onshore industry to support every stage of the
development of construction facilities.
ABHAY OCEAN’S Survey services support every stage in the development of both
onshore, offshore and near shore facilities. These include geophysical and
geotechnical investigations, bathymetry, Hydrographical survey to provide the
information required by engineers designing offshore platforms, pipelines and cables,
and to support dredging, reclamation and other near shore civil works.
Shallow seismic records are interpreted by our geophysicists to understand complex
seabed geology and sonar records are used to map seabed features that have been
identified and located during the survey.
Our engineers examine soil samples recovered from drilling operations to calculate
soil strength and perform foundation engineering studies required by the engineers
and designers of both onshore and offshore structures / constructions.
The geophysical information gathered is required prior to the design and installation
of subsea pipelines and offshore structures. Hydrographic surveys are carried out to
chart the seafloor and used for navigation or engineering, design purposes and
volume calculation for dredging activities.
•Pipeline and cable route surveys
•Rig and platform site surveys
•High resolution seismic surveys
•Large scale mapping / hazard surveys
•Near shore geophysical Surveys
•Bathymetric surveys
•Hydrographic Surveys
•Hydro Dam & Reservoir Surveys
• Land Survey
• Oceanographic Survey
• Dredging Survey
• Geotechnical & Geophysical Survey
• Navigational & Positioning Survey
• Mooring
• Offshore survey
• Soil Investigation & Material Testing
WE PROVIDE THE FOLLOWING SERVICES FOR:

AOIL uses a wide variety of technologies in order to create
accurate assessments of a range of underwater conditions. All
surveys use a combination of technologies as necessary for the
requirements of the project.
Digital sonar
Scanning or side-scan sonar
Sub-bottom profiling systems
Differential global positioning system (DGPS)
Robotic total station
Laser
Digital CCTV
Special camera lenses
Gas sensor
Solid state bearing and inclinometer
Electronic tide gauge
Long tether
UNDERWATER SURVEY TECHNOLOGIES FOR
INSPECTION OF UNDERWATER CONDITIONS
AOIL uses a wide variety of technologies in order to create
accurate assessments of a range of underwater conditions. All
surveys use a combination of technologies as necessary for the
requirements of the project.
Digital sonar
Scanning or side-scan sonar
Sub-bottom profiling systems
Differential global positioning system (DGPS)
Robotic total station
Laser
Digital CCTV
Special camera lenses
Gas sensor
Solid state bearing and inclinometer
Electronic tide gauge
Long tether

DIGITAL SONAR
Sonar is a basic tool of underwater surveys.
A programmable, narrow-beam sonar head generates an acoustic pulse. The sound
frequency and pulse can be modified and calibrated to suit conditions. When the
sound pulse hits a target, it bounces back and the echo appears as a data point.
Data points are calculated using the angle of the sonar head, the speed of sound in
water and the travel time.
Consecutive profiles or cross-sections of the pipe, surface or other targeted feature
are built as the rotating sonar head mechanically sweeps about its axis and travels
along a pre-determined path. When operating within a ±45° angle of incidence to
the targeted feature, the overall accuracy of our sonar system is considered to be
better than 0.5% of range.
The sonar system can be deployed from a robotic tractor, skid, float or small boat.
Data from the sonar, attitude sensor and other technologies is fed into our software
and used to calculate X, Y and Z information, and can then be produced in a
variety of formats. When the sonar is combined with a CCTV camera, the sonar
image is displayed on screen as a picture in picture.
Using sonar, data can be gathered from a vertical dam face, across the bottom,
under overhangs or other vertical structures, or inside pipes and sewers.
DIGITAL SONAR
Sonar is a basic tool of underwater surveys.
A programmable, narrow-beam sonar head generates an acoustic pulse. The sound
frequency and pulse can be modified and calibrated to suit conditions. When the
sound pulse hits a target, it bounces back and the echo appears as a data point.
Data points are calculated using the angle of the sonar head, the speed of sound in
water and the travel time.
Consecutive profiles or cross-sections of the pipe, surface or other targeted feature
are built as the rotating sonar head mechanically sweeps about its axis and travels
along a pre-determined path. When operating within a ±45° angle of incidence to
the targeted feature, the overall accuracy of our sonar system is considered to be
better than 0.5% of range.
The sonar system can be deployed from a robotic tractor, skid, float or small boat.
Data from the sonar, attitude sensor and other technologies is fed into our software
and used to calculate X, Y and Z information, and can then be produced in a
variety of formats. When the sonar is combined with a CCTV camera, the sonar
image is displayed on screen as a picture in picture.
Using sonar, data can be gathered from a vertical dam face, across the bottom,
under overhangs or other vertical structures, or inside pipes and sewers.

SCANNING OR SIDE-SCAN SONAR
AOIL uses side-scan sonar to investigate seafloor conditions such as scour
patterns, obstructions, the type and size of debris, and the condition of
pipelines and cables. Side-scan is useful in detecting debris items and other
obstructions that may be hazardous to shipping or to seafloor installations by
the oil and gas industry. Side-scan sonar is also used for dredging operations
and environmental studies.
Side-scan uses a sonar device that emits fan-shaped pulses toward the seafloor
across a wide angle perpendicular to the path of the sensor through the water,
which may either be towed from a surface vessel, or the sensor may be rotated
about a stationary point.
The intensity of the acoustic reflections from the seafloor is recorded in a
series of cross-track slices. When stitched together along the direction of
motion, these slices form an image of the sea bottom within the swath
(coverage width) of the beam, and the resulting images can be combined and
overlaid on a 3D wire mesh surface.
Side-scan data are frequently acquired along with sub-bottom profiler data.

SUB-BOTTOM PROFILING SYSTEMS
Especially useful in surveys of river crossings, sub-bottom
profiling systems measure the positions of objects that exist below
the bottom. A sound source emits a signal downwards into the
water and a receiver records the reflected return. Some of the
acoustic signal will penetrate the bottom and be reflected when it
encounters a change in density such as a pipeline or sediment
layers. The system uses this reflected energy to provide
information on features beneath the bottom.
Sub-bottom profiling systems can be useful for calculating pipe
cover or exposure, or areas of concern. The penetration depth
depends on the hardness of the overlying layers and the presence
of gas deposits, such as methane.

Differential Global Positioning System (DGPS)
Accurate positioning allows precise geo referencing and accurate
collation of data from multiple technology sources.
The Differential Global Positioning System (DGPS) is an
enhancement to the Global Positioning System. It uses a network of
fixed, ground-based reference stations to broadcast the difference
between the positions indicated by the satellite systems and the
known fixed positions.
Depending on the accuracy required, AOIL uses a Trimble Pro
XRS (sub metre) or RTK GPS (centimetre) receiver. The Pro XRS
offers GPS, WAAS, EGNOS, satellite differential, and beacon
capabilities. It also uses patented multipath rejection technology to
remove multipath signals in reflective environments.

Robotic total station
For tracking and positioning to
centimetre accuracy we use a
Trimble 5600 or Trimble S6
robotic total station in
combination with the sonar
head prism. The S6 has a spin
rate of 115 degrees per second
and a distance accuracy of +/-
0.8 mm +1 ppm.
Laser
AOIL uses proprietary laser
measurement devices
specifically to obtain data on
pipe profiles above the water
line. Combining sonar and laser
data provides a complete pipe
profile, while adding digital
CCTV images enables post-
survey review of actual pipe
condition.

ELECTRONIC TIDE GAUGE
To track water elevation we us a submersible pressure
transmitter. This device stores pressure, temperature and time
data, and the data is also monitored in real time via a radio link.
The tide gauge is calibrated on site by following our written
procedures for field calibration.

HYDROGRAPHIC SURVEYS
AOIL Surveyor conducts hydrographic surveys using single-
beam and multi-beam depth sounders with hull-mounted
transducers. We use the most stringent Class 1 standards
required by the Engineers for pre- and post-dredge
hydrographic surveys.

The activities in the offshore industry are the mainstay of our
business. From positioning to surveying and mapping; the
company is well-equipped to offer a full service to the oil and
diamond mining industries.
The supply and interpretation of high resolution multibeam
surveys is key to the success of many of our clients and
Underwater Surveys has undertaken work for most of the larger
diamond mining and oil exploration companies.
Oil exploration/drilling activities off the West and East coasts are
of particular interest and Underwater Surveys is well geared to
support companies operating there.
Demand for marine phosphates is on the increase and some marine
diamond miners are focusing on this resource as the price
continues to climb on international markets.
OFFSHORE SURVEYS
The supply and interpretation of high resolution multibeam
Underwater Surveys has undertaken work for most of the larger
diamond mining and oil exploration companies.
Oil exploration/drilling activities off the West and East coasts are
of particular interest and Underwater Surveys is well geared to
support companies operating there.
Demand for marine phosphates is on the increase and some marine
diamond miners are focusing on this resource as the price
continues to climb on international markets.

PORT/ DREDGING SURVEYS
The ongoing activity in India with regard to harbour and port
upgrades is also of particular interest to Underwater Surveys as
we focus on port and harbour breakwater surveys as well as pre
and post dredge surveys.
It is important to establish an accurate measure of dredging
volumes, because dredgers charge per cubic metre dredged and a
discrepancy in the amount invoiced versus the actual amount
dredged should be avoided.
We have done a lot of work to enhance the safety of navigation.
In some cases a port survey in the developing countries has
increased the usability of the port, as well as lowered the
insurance premiums for internationally registered vessels entering
the port.

OFFSHORE SURVEYS
The supply and interpretation of high resolution multi-beam
Underwater Surveys has undertaken work for most of the
larger mining and oil exploration companies.
Oil exploration/drilling activities off the West and East coasts
are of particular interest and Underwater Surveys is well
geared to support companies operating there.
Demand for marine phosphates is on the increase and some
marine diamond miners are focusing on this resource as the
price continues to climb on international markets.
Offshore Surveys Services
Port Clearance & Harbour Breakwater Surveys
Approach Channel Surveys
Cable Route Surveys
Pipeline Inspection/Route Surveys
Pre- and Post Dredge Surveys
Diamond Mining Surveys
Regional Mapping Surveys
Archaeological Surveys
OFFSHORE SURVEYS
The supply and interpretation of high resolution multi-beam
Underwater Surveys has undertaken work for most of the
larger mining and oil exploration companies.
Oil exploration/drilling activities off the West and East coasts
are of particular interest and Underwater Surveys is well
geared to support companies operating there.
Demand for marine phosphates is on the increase and some
marine diamond miners are focusing on this resource as the
price continues to climb on international markets.
Offshore Surveys Services
Port Clearance & Harbour Breakwater Surveys
Approach Channel Surveys
Cable Route Surveys
Pipeline Inspection/Route Surveys
Pre- and Post Dredge Surveys
Diamond Mining Surveys
Regional Mapping Surveys
Archaeological Surveys

POSITIONING
Accurate underwater positioning is extremely important in the
offshore environment/industry and with satellite-based wide area
GPS positioning system that we offer – we are able to provide
"decimeter accuracy" anywhere in the world.
Our positioning services include the following-
Satellite Navigation Services
Surface and Underwater Positioning Solutions
ROV Positioning Support
Rig and Anchor Handling Positioning Support
RTK GPS Positioning

AOIL has a survey division that specialize in inland hydrographic
surveys and the whole spectrum of engineering surveys.
Specialised Inland Hydrographic and Engineering Surveys
Inland Hydrographic Surveys (Single / High Resolution
Multibeam Echo Sounding)
Sedimentation Surveys in Dams, Barrages and Rivers
Capacity Surveys of Reservoirs/Dams (% Useable Water and %
Dead Water)
Determining Lowest Outlet of Reservoirs/Dams
River Profiling for Hydrological Studies
River Profiling for Flood Line Calculation
River Profiling for Environmental Studies
River Profiling for Engineering Design
As-Built Structure Surveys on Land and in Water
Engineering Inspections of Dam Walls
Capacity and Engineering data plan for Water Resource
Management of dams using singlebeam/multibeam echosounder
and a combination of conventional survey methods
AOIL has a survey division that specialize in inland hydrographic
surveys and the whole spectrum of engineering surveys.
Specialised Inland Hydrographic and Engineering Surveys
Inland Hydrographic Surveys (Single / High Resolution
Multibeam Echo Sounding)
Sedimentation Surveys in Dams, Barrages and Rivers
Capacity Surveys of Reservoirs/Dams (% Useable Water and %
Dead Water)
Determining Lowest Outlet of Reservoirs/Dams
River Profiling for Hydrological Studies
River Profiling for Flood Line Calculation
River Profiling for Environmental Studies
River Profiling for Engineering Design
As-Built Structure Surveys on Land and in Water
Engineering Inspections of Dam Walls
Capacity and Engineering data plan for Water Resource
Management of dams using singlebeam/multibeam echosounder
and a combination of conventional survey methods

TOPOGRAPHIC SURVEY SERVICES
Our experience has
seen us tested in
some of the most
challenging
environments in
India, from wind
swept coastlines &
beaches, tidal
causeways, dry-dock
installations and
working quarry &
landfill sites.
We have also completed surveys on airport runways, road bridges,
piers, carriageways, within water treatment works, along pipeline
routes, and almost every other modern day location and facility.
Our experience has
seen us tested in
some of the most
challenging
environments in
India, from wind
swept coastlines &
beaches, tidal
causeways, dry-dock
installations and
working quarry &
landfill sites.

HYDROGRAPHIC SURVEY SERVICES
Single Beam Bathymetry
Multibeam Bathymetry
Side-Scan Sonar
Sub-Bottom Profiling
Geophysical Survey
Magentometer Surveys
Diver Inspection Surveys
Diver Inspections
Marine Support Services
Survey Vessel Charter
Aspect Land & Hydrographic Surveys' marine survey division offers a wide
variety of skills and services, including bathymetric surveys, side-scan sonar
imagery, magnetometer surveys, sub-bottom profiling, full geophysical
interpretation & analysis and dock wall surveys / investigation.
Our capabilities include single or multibeam echosounder bathymetry to
provide the client's required resolution in either 2D paper or electronic plot
or as a 3D model, be that a fly through for presentation purposes or
conventional models to allow engineering development or scientific
interpretation. Our bathymetric data can be overlain with geo-referenced
sonar backscatter imagery either from side-scan or Multibeam echosounder.
Full, high-resolution multibeam bathymetry products can include a variety
of digital files for ingestion in other modelling or design software, paper
products including detailed bathymetry, colour-banded contours,
geomorphological assessment and underwater target detection and
classification.
HYDROGRAPHIC SURVEY SERVICES
Single Beam Bathymetry
Multibeam Bathymetry
Side-Scan Sonar
Sub-Bottom Profiling
Geophysical Survey
Magentometer Surveys
Diver Inspection Surveys
Diver Inspections
Marine Support Services
Survey Vessel Charter
Aspect Land & Hydrographic Surveys' marine survey division offers a wide
variety of skills and services, including bathymetric surveys, side-scan sonar
imagery, magnetometer surveys, sub-bottom profiling, full geophysical
interpretation & analysis and dock wall surveys / investigation.
Our capabilities include single or multibeam echosounder bathymetry to
provide the client's required resolution in either 2D paper or electronic plot
or as a 3D model, be that a fly through for presentation purposes or
conventional models to allow engineering development or scientific
interpretation. Our bathymetric data can be overlain with geo-referenced
sonar backscatter imagery either from side-scan or Multibeam echosounder.
Full, high-resolution multibeam bathymetry products can include a variety
of digital files for ingestion in other modelling or design software, paper
products including detailed bathymetry, colour-banded contours,
geomorphological assessment and underwater target detection and
classification.

SINGLE BEAM BATHYMETRY
Our single beam (SBES) bathymetric surveys are primarily
conducted using survey grade Kongsberg Maritime EA400 dual
frequency echo sounders. Other equipment may be utilized to suit
the client's needs and the operating environment as required. RTK
GPS positioning is preferred and heave compensation is applied to
all surveys.
Tidal data is either processed from the RTK GPS or obtained from
the deployment of a fully calibrated and referenced tide gauge.
High quality survey planning, real time quality assurance and
stringent post survey quality control assure appropriate survey
standards are met. We adhere to nationally and internationally
accepted hydrographic survey standards including the
International Hydrographic Organization's.

MULTIBEAM BATHYMETRY
AOIL operate a Kongsberg EM3002 shallow water high definition multibeam
(MBES) system. This system is optimized to operate in depths between 0.5 and
200m.
The system operates a swath width of 4 x water depth as standard. When
operating in extreme shallow water and when the client requires 100% seabed
insonification we prefer to utilize a second transducer making this system a dual
head EM3002, capable of swath widths up to 10x water depth and thereby
reducing the time taken on the data gathering task very significantly.
Multibeam Bathymetry Services-
- Bathymetric surveys to IHO Special Order standard
- Environmental surveys
- Offshore renewable energy projects
- Dock wall inspections
- Marine archaeology projects
- Wreck and object detection
- Dredging control and monitoring

Side-scan sonar is used to create an image of large areas of the
sea floor, this system is used for mapping the seabed for a wide
variety of purposes, including creation of nautical charts and the
detection and identification of underwater objects and
bathymetric features.
It is also used to conduct surveys for marine archaeology and in
conjunction with seafloor samples it is able to provide an
understanding of the differences in material and texture type of
the seabed.
Side-scan sonar imagery is also commonly used to detect items of
debris and other obstructions on the seafloor that may be
hazardous to shipping or to seafloor installations, such oil and gas
pipelines, outfalls, cable routes, oil / gas platform positioning and
marine industry construction works.
SIDE-SCAN SONAR SURVEY
SIDE SCAN SONAR TO IDENTIFY & PIPELINES OR OUTFALLS.
Side-scan sonar is used to create an image of large areas of the
sea floor, this system is used for mapping the seabed for a wide
variety of purposes, including creation of nautical charts and the
detection and identification of underwater objects and
bathymetric features.
It is also used to conduct surveys for marine archaeology and in
conjunction with seafloor samples it is able to provide an
understanding of the differences in material and texture type of
the seabed.
Side-scan sonar imagery is also commonly used to detect items of
debris and other obstructions on the seafloor that may be
hazardous to shipping or to seafloor installations, such oil and gas
pipelines, outfalls, cable routes, oil / gas platform positioning and
marine industry construction works.

GEOPHYSICAL SURVEY
Geophysical survey, or
reflection seismology, is a
method of exploratory
geophysics that uses the
principles of seismology to
estimate the properties of the
earth's subsurface from
reflected seismic waves.
The method requires a controlled seismic source of energy, and by
noting the time it takes for a reflection to arrive at a receiver it is
possible to estimate the depth of the feature that generated the
reflection.
Some of the acoustic signal will penetrate the seabed and be
reflected when it encounters a boundary between two layers that
have different acoustical properties, known as acoustic impedance.
Geophysical survey, or
reflection seismology, is a
method of exploratory
geophysics that uses the
principles of seismology to
estimate the properties of the
earth's subsurface from
reflected seismic waves.

Magnetometry measures local variations in the earth's magnetic field.
Small local anomalies result from the contrasting levels of magnetic
susceptibility which exist between in filled 'cut' features or structures and
the local substrate or bedrock. This effect is principally due to the varying
iron content in the soil and rock forming minerals.
The majority of magnetometer surveys are undertaken with a gradiometer
which measures the magnetic gradient between two sensors
(magnetometers) arranged on a horizontal separation, normally 1m or 2m
apart.
Readings can be automatically logged allowing large amounts of data to be
recorded and stored quite rapidly.
Surveys are usually undertaken along predetermined gridlines, logging at
an average of four readings per metre.
Post-processing of data on-site allows the survey results to be monitored
and modified as required.
MAGNETOMETER SURVEY
Magnetometry measures local variations in the earth's magnetic field.
Small local anomalies result from the contrasting levels of magnetic
susceptibility which exist between in filled 'cut' features or structures and
the local substrate or bedrock. This effect is principally due to the varying
iron content in the soil and rock forming minerals.
The majority of magnetometer surveys are undertaken with a gradiometer
which measures the magnetic gradient between two sensors
(magnetometers) arranged on a horizontal separation, normally 1m or 2m
apart.
Readings can be automatically logged allowing large amounts of data to be
recorded and stored quite rapidly.
Surveys are usually undertaken along predetermined gridlines, logging at
an average of four readings per metre.
Post-processing of data on-site allows the survey results to be monitored
and modified as required.

DIVER INSPECTION SURVEYS
The divers represent some of the most experienced in the country
and have developed a reputation for performing the most difficult
of underwater tasks safely, efficiently and in a timely & cost
effective manner.
Complex survey and salvage operations have been accomplished
at open water locations in water depths of up to 40 metres, with
safety and professionalism paramount in all operations.
.

MICRO-BATHYMETRYAND UNDERWATER METROLOGY
Micro-bathymetry relies on high precision acoustic
measurements and definition. It is done by surveying with high
accuracy and resolution multibeams that result in clouds of
georeferenced sounding points that can be visualized in 3D. It is
done by scanning in multiple passes with either remote
controlled vehicles or autonomous from various vantage points.
It has applications in 3D site surveys and structure inspections,
dam, bridge and harbor inspection, archaeology related
activities and scour and erosion monitoring. Following the high
precision and resolution data, distances and surfaces can be very
rigorously measured.

We have the equipment and
expertise to undertake a wide
range of marine support
services, including pre & post
dredge surveys, turbidity
monitoring, barge & rig
positioning and associated
works whether in open
waters or congested
harbours, waterways or
approach channels.
Dredging Surveys &
Supervision
We have significant
experience in dredging
supervision works, including
pre and post dredge surveys
and payment volume
calculations.
MARINE SUPPORT SERVICES
We have the equipment and
expertise to undertake a wide
range of marine support
services, including pre & post
dredge surveys, turbidity
monitoring, barge & rig
positioning and associated
works whether in open
waters or congested
harbours, waterways or
approach channels.
Dredging Surveys &
Supervision
We have significant
experience in dredging
supervision works, including
pre and post dredge surveys
and payment volume
calculations.
We regularly conduct interim surveys for numerous dredging
contractors throughout India- although we act as an independent
survey company, which is a major benefit to the client or port authority.
Dredger Operations
Plough Dredging-We also act as the client's representative on
contractor's surveys to witness and verify survey results, as required in
many contracts. Projects include both Capital Dredging works (quay
construction, etc) utilising Backhoe or Bucket dredgers and
Maintenance Dredging (removal of silt / sediment over a previously
established level) usually carried out by Grab Hopper dredgers and
workboats operating Plough Levelling techniques.

UNDERWATER INFRASTRUCTURE MAINTENANCE
Underwater infrastructure is often business critical. By
conducting a survey of your underwater infrastructure and creating
a maintenance plan you can maximize utilization and increase
lifespan.
AOIL can carry out a
survey of your maritime
infrastructure to assess
its current status.
Typical structures
surveyed include e.g.
port basins, piers,
breakwaters, bridges,
dams, power plants and
offshore wind parks.
Underwater survey is
carried out with high
resolution MBES
sensors that gather
significantly detailed
information compared
to traditional survey
methods. Survey results
are not dependent on the
water visibility and
surveys can be carried
out even during night
time.
AOIL can carry out a
survey of your maritime
infrastructure to assess
its current status.
Typical structures
surveyed include e.g.
port basins, piers,
breakwaters, bridges,
dams, power plants and
offshore wind parks.
Underwater survey is
carried out with high
resolution MBES
sensors that gather
significantly detailed
information compared
to traditional survey
methods. Survey results
are not dependent on the
water visibility and
surveys can be carried
out even during night
time.
BERTH BOTTOM EROSION
PIPE LINE SURVEY

Simultaneously with the
underwater survey, also
above water structures are
documented with a laser
scanner, providing an
integrated model of both
under and above water
structures.
When extreme preciseness
is needed, the survey
results can be further
enhanced with a scanning
sonar survey, which is the
most accurate underwater
survey method available
LASER SCANNER
Simultaneously with the
underwater survey, also
above water structures are
documented with a laser
scanner, providing an
integrated model of both
under and above water
structures.
When extreme preciseness
is needed, the survey
results can be further
enhanced with a scanning
sonar survey, which is the
most accurate underwater
survey method available

3D MODEL OF UNDERWATER INFRASTRUCTURE
Survey results are 3D point clouds, which our experts build
into an extremely accurate, fully integrated model of
underwater and above the water infrastructures. Experts
analyze the data and point out any changes in the structures.
Typical issues found include quay wall damages, scouring that
has led to slope deformation as well as foreign objects and
other changes on sea bed.
channel slope inspection

SCOUR PROTECTION, MONITORING & PREVENTION
The presence of scour (erosion of the seabed surface)
around marine structures including offshore wind farm
turbines is a common occurrence. Scour prevention
measures are often deployed when wind turbines are
installed in order to minimize the risk of future problems
associated with scour.
Scour erosion around an offshore wind turbine base
captured real time

UNDERWATER BRIDGE INSPECTION & SCOUR MONITORING
Bridge inspections, conducted by certified bridge inspection
divers, are the most common activity. Sonars have been used to a
small degree for remote depth monitoring, post-navigational
incident and search/recovery activities. However, bridge
inspections are still primarily conducted using only divers. These
inspections can be time consuming and present significant health
and safety risks to divers .
The 3D sonar provides a real-time, geo-referenced, high
resolution imaging that is intuitive and easily understood. It is
uniquely suited to fill the role of a submerged structure imaging
system that equals or exceeds the current standard of visual
inspection.
Bridge Inspection close up – visual marks.

UNDERWATER BRIDGE INSPECTION & SCOUR MONITORING
The 3D sonar provides a real-time, geo-referenced, high
resolution imaging that is intuitive and easily understood. It is
uniquely suited to fill the role of a submerged structure imaging
system that equals or exceeds the current standard of visual
inspection.
Wind Turbine Inspection.

UNDERWATER MANIFOLD 3D INSPECTION & SCOUR MONITORING

CODA OCTOPUS 3D SONAR- SCOUR PROTECTION

CODA OCTOPUS- 3D SONAR- JACKET INSPECTION

CODA OCTOPUS- 3D SONAR PIPELINE INSPECTION

Thank You.
For Any Query Please Contact :
CAPT. JAGDISH KHOKHAR
(Managing Director)
Cell: +91 99 2030 9055
E-mail: jk@abhay-ocean.com
www.abhay-ocean.com
Thank You.
For Any Query Please Contact :
CAPT. JAGDISH KHOKHAR
(Managing Director)
Cell: +91 99 2030 9055
E-mail: jk@abhay-ocean.com
www.abhay-ocean.com

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