The Mission Specialist Navigation Package allows for a higher level of autonomous control. The package integrates a Doppler Velocity log (DVL) which locks onto and tracks the ROV’s position along the sea bottom. The DVL estimates distance traveled and calculates the current position with simple “dead reckoning” navigation. A GPS antennae is used to correct the vehicle’s position when it is on the surface. These sensors are seamlessly integrated on the Defender through Greensea’s Balefire software with station keeping, requisition, mission planning, dynamic positioning, and data string export features. A USBL system can added to the system and used on mission profiles where the sea bottom exceeds the operational range of the DVL.

The Navigation Package includes:

DVL

  • Depth rating - 300m
  • Frequency of Operation - 1MHz
  • Beam Width - 2.9 degrees
  • Configuration - 4-beam Janus array convex transducer, 25 degree beam angle
  • Single ping std @ 3 m/s - 0.5cm/s
  • Minimum altitude - 0.2m
  • Maximum altitude - 75m

GREENSEA UPGRADES

  • Station Keeping
  • Reacquisition
  • Mission Planning
  • Dynamic Positioning

MAX-M8W GPS MAST

  • Depth rating - 300m
  • Horizontal Position accuracy - 2.5m
  • Time-to-first-fix - 29s
  • Sensitivity - -166 dBm

Optional:

USBL

  • Depth Rating - 300m
  • Acoustic Range - 1km radius horizontal, 1km vertical
  • Range Resolution - ±50mm
  • Velocity-of-Sound Range - 1300ms-1 to 1700ms-1
  • Beacon Velocity - Active Doppler compensation, up to 15kts (28kph)
  • Communications - Broadband spread spectrum encoding, 24-32kHz, 100 baud. Multi-tiered Acoustic Protocol Stack.

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2019 MSS NAVIGATION PACKAGE

 2019 NORTEK DVL 300m

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