ROV & Diver tracking  

click right and download a printable PDF file; 110 Kb

The DiveBase program is used for all for tracking operations, to replay existing mission records,  configure  DiveTracker stations, and perform noise tests.

Accurate and reliable position information is key to successful ROV operations.  Be it underwater inspection, construction, or search—you need a good tracking system to complete your job with confidence, efficiency, and speed.  Pilot is the ideal tracking system for small and mid-size ROVs and Divers.  

 
The PILOT System: A Surface Station And A ROV Transponder
  • The Surface Station is the centerpiece of the PILOT system. Three cabled sonar transducers (antennae for sound) are connected to the surface station and lowered over the side of the boat. The transducers form a triangle which is used to locate the ROV. A Windows 95, 98 or NT computer serves as the data display and entry unit. The Windows computer runs DiveBase, the surface station software. The ROV range, direction and depth appears on the RADAR style screen of DiveBase.
  • The surface station will track any underwater vehicle that is equipped with a ROV Transponder. TLT-2 transponders are designed for tracking small ROV's to depths of 330 meters (1000 feet). It is suitable for mid-size ROV.
 
 


 

Tracking Technology

Short baseline acoustic tracking with three 'over the side' sonar transducers complemented by depth telemetry.

Applications

Optimized for tracking small & mid-size ROV, but also suitable for diver & AUV tracking or instrument recovery.

Max. Range & Depth

500 meter range & 300 meter depth in basic configuration.

Tracking Accuracy

Slant range +/- 0.15 meter typical; depth +/- 1.5 meter; bearing accuracy depends on transducer separation: +/- 0.4 degrees with 50 meter baseline to +/- 4 degrees with 5 meter baseline.

Number Of Targets

Ten targets can be tracked.

Surface Stations

STM-1 module is mounted in a drive bay of a PC or used as a tabletop device.  STM-1 is powered by PC 12V power or external supply.

ROV Transponders

TLT-2 transponder attaches to ROV.  The TLT-2 is powered by a set of six user replaceable 'AA' cells which last about 40 hours.  Battery condition is transmitted per telemetry and is displayed by the surface station.  TLT-2 transponder is rated for depths of up to 300 meters. 

Software Features

This software runs on Windows 95 and NT machines.  Features include tracking a single vehicle, ROV trace, color coded depth, numerical range, depth and bearing display, zoom and pan, various position filters, dive replay capability, extensive self tests and system status displays. Also includes multi-vehicle tracking, long baseline operation and diver/AUV navigation functions, capabilities to vector and bitmap chart overlays and GPS integrated operation.

Operational Strengths

Multi-channel operation and short baseline technology yield excellent results in shallow, constricted and noisy waters with high multi-path as well as deep and open waters.  Rugged design, battery operation capability and simple setup is compatible with small boat and 'vessel of opportunity' jobs. 

Operational Limits

Due to geometric factors, tracking accuracy is limited at significant depth directly below surface vessel.  A ROV located 300 meters below the surface directly below the tracking system may appear at an angle of up to 8 degrees from the vertical.  Accuracy  is generally considered appropriate  for ROV piloting tasks, but not for precision surveys.  Use our long baseline configurations  for positioning applications requiring sub-meter accuracy. PILOT is readily upgraded to support long baseline operations.