This document provides information about autonomous underwater vehicles (AUVs). It discusses that AUVs are robotic devices that are controlled and piloted by onboard computers to perform underwater survey missions. They use various sensors like DVL, CTD, side-scan sonars, and magnetometers to navigate autonomously and map ocean features. AUVs can navigate using acoustic positioning systems when operating within a net of seafloor transponders or using ultra-short baseline positioning relative to a surface ship's GPS position. They are powered primarily by rechargeable batteries and propelled by propeller-based thrusters. AUVs have commercial uses in mapping seafloors for oil/gas infrastructure and military uses like mine

1. AUV
AUTONOMOUS UNDERWATER VEHICLES

2. INTRODUCTION
AUVs are Autonomous Underwater Vehicles that are used to
perform underwater survey missions.
It is a robotic device that is driven through water by propulsion
system, controlled and piloted by an onboard computer.
HUGlN 3000 was the world's first AUV used in commercial
survey operations.

3. STRUCTURE

4. SYSTEM ARCHITECTRE
4

5. GENERAL ARRANGEMENT OF THE AUV

10. PARAMETERS OF THE AUV
1. SENSORS
2. NAVIGATORS
3. PROPULSION
4. POWER

11. SENSORS
Primarily oceanographic tools, AUVs carry sensors to
navigate autonomously and map features of the ocean.
Typical sensors include:
I. DVL Sensor
II. CTD Sensor
III. Acoustic Imaging System
IV. Optical Sensor
V. Side-scan sonars
VI. Magnetometers

12. NAVIGATION
 AUVs can navigate using an underwater acoustic positioning system.
 When operating within a net of sea floor deployed transponders this is known
as LBL navigation.
 When a surface reference such as a support ship is available, ultra-short
baseline (USBL) or short-baseline (SBL) positioning is used to calculate where
the subsea vehicle is relative to the known (GPS) position of the surface craft by
means of acoustic range and bearing measurements.

13. PROPULSION
 AUVs can rely on a number of propulsion techniques, but propeller
based thruster or Kort nozzles are the most common by far.
 These thrusters are powered by electric motors.

14. POWER
 Most AUVs in use today are powered by rechargeable batteries (lithium ion,
lithium polymer, nickel metal hydride etc.),
 The larger AUVs are powered by aluminum based semi-fuel cells, but these
require substantial maintenance.
 An emerging trend is to combine different battery and power systems with
Ultra-capacitors.

15. APPLICATION OF AUVs
COMMERCIAL USES
 The oil and gas industry uses AUVs to make detailed maps of the seafloor before they
start building subsea infrastructure like pipelines.
MILITARY USES
 A typical military mission for an AUV is to map an area to determine if there are any
mines, or to monitor a protected area for new unidentified objects.
 AUVs are also employed in anti-submarine warfare, to aid in the detection of manned
submarines.

16. RESEARCH USES
 Scientists use AUVs to study lakes, the ocean, and the ocean floor. A variety of
sensors can be affixed to AUVs to measure the concentration of various elements
or compounds, the absorption or reflection of light, and the presence of
microscopic life.

17. MAYA – India’s first Indigenously developed AUV