Vessel-Mounted Operations

Accommodating situational awareness for challenging underwater currents

Download specification sheet
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The VM Operations helps operators on vessels make informed decisions during subsea operations in areas affected by underwater currents. It is designed to give offshore operators clear and detailed information on current speed and direction from the vessel to the seafloor.

VM Operations offers:

  • User-friendly software
  • In-water serviceable instrumentation
  • Salinity-independent velocity measurements
VM operations

Key specifications

Spec Name Spec value
Profiling range* 100 m
Cell size 1-6 m
Minimum blanking 0.5 m
Minimum accuracy 0.3% of the measured value
Velocity resolution 0.1 cm/s
*Maximum range depends on acoustic scattering conditions and transmit power

What is included in the package?

  • 333 kHz 4-beam Acoustic Doppler Current Profiler (ADCP)
  • Processing unit and junction box
  • Bottom penetration unit
  • VM Operations acquisition software

Optional extras include:

  • DNV type-approved single or double-bottom penetration unit (sea valve)
  • DVL-grade speed over ground (SOG) output
  • Review software
  • Replay software
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How can VM Operations be used?

Some applications VM Operations can be used in are:

  • ROV and diver inspections
  • Subsea installations (i.e. cable laying or rock dumping)
  • Dynamic positioning of a vessel during operation
  • Towed (seismic) surveys
  • Fuel efficiency monitoring
  • Load calculation
  • Insight planning upcoming projects

How does VM Operations software work?

The user-friendly, VM Operations software, gives operators the information they need at a glance. It is intentionally designed for those who need to increase subsea situational awareness and efficiency on USVs, survey vessels and installation vessels.

Watch the video to get to know all benefits this software brings.

“The SeaKite vehicle is towed with between three and four times the water depth of cable deployed, and about 3 to 4 m above the seafloor. And it’s deployed behind the Geo Ranger at a speed of four to five knots. So knowing the vessel’s speed through water plus the tidal current is absolutely key to being able to accurately tow the vehicle. The Nortek vessel-mounted ADCP and software provided this on board the Geo Ranger.”

— Ian Rouse, offshore manager, Kraken Robotics

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VM Operations
VM Operations software
Cable laying


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