1. Marine Instrumentation Class
HOVs, ROVs and AUVs
Marine Instrumentation Class

2. HOV
Human Occupied Vehicle
Alvin
Pisces IV and V
Johnson Sea Link

3. Benfits/Limitations HOVs You are right there to see what is going on
Limited by battery and air supply
Quiet large and complicated to operate
Usually have a dedicated support ship

4. UUV
Unmanned Underwater Vehicle
AUVs
ROVs

5. ROVs Remotely Operated Vehicle Connected to ship with a cable
Cable called either
Tether
Umbilical cable
Fiber-optic cable with power and strength members
Unlimited capabilities
Wide Varity of sizes
Micro (less then 3kg)
Trenching more than 200hp
Two mode of operation
Free Swimming
Garaged
Large component in the Oil and Gas industry
Pipeline inspection/repair
Cable inspection
Etc.

6. ROVs Scientific research
Can perform tasks instrumentation is not capable of
Push cores
Organism collection
Instrument retrieval
Exact location sample collection
Cheaper than a HOV

7. Benefits/Limitations
ROV
Complete control over operations
For deepwater takes place of diver
Can perform challenging tasks over long periods of time
Continuously if needed
Limitations lifting capability
Requires skilled operator

8. AUV Autonomous Underwater Vehicle Various of sizes
One-Man portable to couple of tons
Powered by propeller
Depth Range
0-6000m
Dependent on Model

9. Eagle Ray AUV - NIUST

10. Benefits/Limitations
Battery life
Hours
Large payload capabilities
Capable of taking instrumentation with high power requirements
Limits duration
Most require surface support vessel

11. Gliders Glider through the water using only buoyancy as propulsion
No external moving parts
Travel Through water in Saw-tooth pattern
Depth Range
0-1200m
Dependent on model
Multiple types
Spray
SeaGlider
Webb Glider
Wave Glider
ANT
Wave Glider

12. Underwater Glider Operation
No external moving parts needed to control glider, control managed through changes in position of an internal mass
This slide illustrates the cyclic saw-tooth flight profile that is achieved by pumping water ballast in and out of the vehicle.
This video clip also illustrates this flight profile. One thing that is immediately apparent from the video is how slow the glider really moves. This can work against you in the presence of strong ocean currents; but it also permits one to operate acoustic arrays in the laminar flow regime with very low self noise.
Energy only needed at
top and bottom of each
‘yo’ to change buoyancy
Wings provide forward
motion during sinking
and floating
Slide Taken from ANT Littoral glider presentation 12

13. Teledyne Webb Research

14. Benefits/limitations
Long deployments
Months
“real-time” data during deployment
Limited payload
Most are small easy to recover
Communication fees are high

15. Power Wave Power Batteries Thermal Solar Alkaline, lithium….
Teledyne Webb Glider
Use Ocean temperature change to alter the state of a wax, creating power
Solar
Wave Glider Power Concept

16. Limitations for all types
Density
Limited be displacement motor
Currents

17. Challenges Positioning underwater AUV/ROV/HOV Gliders USBL
Tracked by surface ship
Doppler Velocity Log (DVL)
Bottom Tracking
Gliders
Dead Reckoning
Internal Navigation System (INS)
Acquires new position every time it surfaces to calculated Currents

18. Communications ROV- Cable AUV Gliders Freewave (Radio comms)
Surface
Iridium (Satellite Comms)
Acoustic
Subsurface
Gliders
Freewave
Iridium