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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
In search and recovery missions, the DVL plays a crucial role in maintaining an optimal altitude for the imaging sonar. For instance, it ensures the sonar remains at a precise depth, such as 15 meters, with the sonar oriented at a 15-degree angle downward. This configuration enhances the effectiveness of the sonar in capturing detailed images during underwater search operations.
Position/Station holding with DVL
The DVL is instrumental in maintaining precise positions during various operations. Whether conducting inspections against a current, deploying a manipulator, or using a laser scanner, the DVL aids in achieving steady and controlled ROV positioning. This capability ensures optimal conditions for detailed inspections and intricate tasks, enhancing overall operational efficiency and accuracy.
Automatic altitude hold
Employing a DVL on the ROV facilitates automatic altitude hold, ensuring course stability in currents and maintaining a consistent altitude above the seafloor. This feature is particularly crucial for benthic surveys, as it prevents collisions with the seafloor and minimizes sediment disturbance. The result is a clearer and more effective benthic survey, optimizing data collection and survey outcomes.
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
In search and recovery missions, the DVL plays a crucial role in maintaining an optimal altitude for the imaging sonar. For instance, it ensures the sonar remains at a precise depth, such as 15 meters, with the sonar oriented at a 15-degree angle downward. This configuration enhances the effectiveness of the sonar in capturing detailed images during underwater search operations.
Position/Station holding with DVL
The DVL is instrumental in maintaining precise positions during various operations. Whether conducting inspections against a current, deploying a manipulator, or using a laser scanner, the DVL aids in achieving steady and controlled ROV positioning. This capability ensures optimal conditions for detailed inspections and intricate tasks, enhancing overall operational efficiency and accuracy.
Automatic altitude hold
Employing a DVL on the ROV facilitates automatic altitude hold, ensuring course stability in currents and maintaining a consistent altitude above the seafloor. This feature is particularly crucial for benthic surveys, as it prevents collisions with the seafloor and minimizes sediment disturbance. The result is a clearer and more effective benthic survey, optimizing data collection and survey outcomes.
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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