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- HomeShopROV | Performance EnhancementsDVL | Pathfinder
DVL | Pathfinder
Enjoy superb stabilization on your REVOLUTION ROV with a Doppler Velocity Log (DVL). Combined with onboard sensors, the DVL enhances your ROV's ability to fight current, hold station, and maintain altitude from the seafloor.
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0.2 - 89m altitude
Precise USBL position
Station keeping
Better navigation in current
Auto altitude holding mode
Doppler velocity log for stabilization and autonomy on your REVOLUTION ROV
The DVL mounts on the bottom of the REVOLUTION and sends four acoustic beams on angles downward. Reflections then calculate the altitude (depth from bottom) and provide an estimate of the speed and direction of movement.
Combined with Deep Trekker BRIDGE sensor technology, the DVL provides more accurate and precise positioning and station holding - even in current.
DVL for search and recovery missions
During a search and recovery mission, the DVL will help maintain an optimal altitude for the imaging sonar, such as 15m above with the sonar on a 15 degree angle downward.
Position/Station holding with DVL
A DVL also is used to help hold position, say when performing an inspection and wanting to hold against current, or when using a manipulator or laser scanner where it is easier to be dead steady.
Automatic altitude hold
Use a DVL on the ROV to help stay on course in current, maintain an altitude above the sea floor. This is important for benthic surveys to get a clear picture without crashing into the bottom and stirring up sediment, making the survey more difficult.
Pathfinder DVL Bottom Tracking
| Resolution | 0.01 mm/s (0.1 cm/s default) |
|---|---|
| Velocity Range | ±9 m/s or +16 m/s upon request |
| Maximum Altitude | 89 m (150 m optional) |
| Minimum Altitude | 0.2 m (<20 cm altitude mode available) |
| Precision @ 1 m/s | ±0.5 cm/s @ ½ alt |
| Precision @ 3 m/s | ±1.5 cm/s @ ½ alt |
| Precision @ 5 m/s | ±2.3 cm/s @ ½ alt |
| Long Term Accuracy | ±1.15% ±0.1 cm/s |
Pathfinder DVL Water Profiling
| Cell Sizes | 0.1 m–4 m |
|---|---|
| Resolution | 1 mm/s |
| Maximum Range | 47 m |
| Minimum Range | 1.9 m |
| Velocity Range | ±12 m/s |
| Maximum Ping Rate | 12 Hz |
| Precision @ 1 m/s | ±7.5 cm/s@2 m bin |
| Precision @ 3 m/s | ±7.5 cm/s@2 m bin |
| Precision @ 5 m/s | ±7.7 cm/s@2m bin |
| Long Term Accuracy | ±0.3% ±0.1 cm/s |
Pathfinder DVL Acoustic
| Number of Beams | 4-phased array |
|---|---|
| 1-Way Beam Width | 2.2° |
| Center Frequency | 614.4 kHz |
| Bandwidth (nominal) | 6.25% of center freq. |
| Beam Angle (nominal) | 30° |
| Source Level (re 1 μPa) | 215 dB@1 m |
Pathfinder DVL Environmental
| Maximum Operating Depth | 300, 1000 m |
|---|---|
| Operating Temperature | -5°C to 45°C |
| Storage Temperature | -30°C to 60°C |
| Weight in Air (OEM/SC) | 1.15/1.9 kg |
| Weight in Water | 0.7 kg |
Doppler velocity log for stabilization and autonomy on your REVOLUTION ROV
The DVL mounts on the bottom of the REVOLUTION and sends four acoustic beams on angles downward. Reflections then calculate the altitude (depth from bottom) and provide an estimate of the speed and direction of movement.
Combined with Deep Trekker BRIDGE sensor technology, the DVL provides more accurate and precise positioning and station holding - even in current.
DVL for search and recovery missions
During a search and recovery mission, the DVL will help maintain an optimal altitude for the imaging sonar, such as 15m above with the sonar on a 15 degree angle downward.
Position/Station holding with DVL
A DVL also is used to help hold position, say when performing an inspection and wanting to hold against current, or when using a manipulator or laser scanner where it is easier to be dead steady.
Automatic altitude hold
Use a DVL on the ROV to help stay on course in current, maintain an altitude above the sea floor. This is important for benthic surveys to get a clear picture without crashing into the bottom and stirring up sediment, making the survey more difficult.
Pathfinder DVL Bottom Tracking
| Resolution | 0.01 mm/s (0.1 cm/s default) |
|---|---|
| Velocity Range | ±9 m/s or +16 m/s upon request |
| Maximum Altitude | 89 m (150 m optional) |
| Minimum Altitude | 0.2 m (<20 cm altitude mode available) |
| Precision @ 1 m/s | ±0.5 cm/s @ ½ alt |
| Precision @ 3 m/s | ±1.5 cm/s @ ½ alt |
| Precision @ 5 m/s | ±2.3 cm/s @ ½ alt |
| Long Term Accuracy | ±1.15% ±0.1 cm/s |
Pathfinder DVL Water Profiling
| Cell Sizes | 0.1 m–4 m |
|---|---|
| Resolution | 1 mm/s |
| Maximum Range | 47 m |
| Minimum Range | 1.9 m |
| Velocity Range | ±12 m/s |
| Maximum Ping Rate | 12 Hz |
| Precision @ 1 m/s | ±7.5 cm/s@2 m bin |
| Precision @ 3 m/s | ±7.5 cm/s@2 m bin |
| Precision @ 5 m/s | ±7.7 cm/s@2m bin |
| Long Term Accuracy | ±0.3% ±0.1 cm/s |
Pathfinder DVL Acoustic
| Number of Beams | 4-phased array |
|---|---|
| 1-Way Beam Width | 2.2° |
| Center Frequency | 614.4 kHz |
| Bandwidth (nominal) | 6.25% of center freq. |
| Beam Angle (nominal) | 30° |
| Source Level (re 1 μPa) | 215 dB@1 m |
Pathfinder DVL Environmental
| Maximum Operating Depth | 300, 1000 m |
|---|---|
| Operating Temperature | -5°C to 45°C |
| Storage Temperature | -30°C to 60°C |
| Weight in Air (OEM/SC) | 1.15/1.9 kg |
| Weight in Water | 0.7 kg |
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