Overview
In recent years, offshore operations have moved farther offshore, often into challenging operational environments. Variable local current and tide patterns make for increased risk, uncertainty, and operational costs. Subsea operations can be limited by these challenges without real-time knowledge of currents.
Using our renowned Signature ADCP technology, the VM Operations is designed to give offshore operators clear and detailed information on current speed and direction from the vessel to the seafloor. This situational awareness improves efficiency during vessel time. Data can be stored and analyzed during future project planning.
Read more about the VM Operations capabilities here.
- Currents
- Bottom track
Highlights
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Concave transducer design allowing for flush mounting, independent of salinity changes
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A 333 kHz frequency for an optimal balance in required range, resolution and accuracy for a wide range of operations at the coastal continental shelf
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Outstanding bottom-track performance, even under challenging conditions
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Robust sea valve allows mounting without increased draft,
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In-water serviceable, diverless, concept via the DNV type-approved sea valve
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Optional hull or pole mount bracket, instead of sea valve solution
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Unique, easy-to-use graphical ADCP interface for the operator, superintendent or client
Usage
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ROV and diver inspections
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Subsea installations (as cable laying or rock dumping)
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Towed (seismic) surveys
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Aid to navigation
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Fuel efficiency monitoring
Setup
The in-water serviceable sea valve solution is a convenient mounting choice for offshore operational vessels. The transducer head can also be mounted with a bracket for permanent pole or hull mount structures. The system connects to a junction box for power and communication.
Deployment
A type-approved sea valve solution makes the ADCP in-water serviceable. Data is streamed directly from the hull of the vessel into the control room in real time during operation.
Data
Designated software provides real-time current speed and direction in a 3D profile plot below the vessel, a history plot for predicting future windows of opportunity, as well as other views of information from the system for operators to make decisions at a glance. Data can also be easily fed into a third-party software.
Profiling range* |
100 m |
Cell size |
1-6 m |
Max no. cells |
128 |
Min. blanking |
0.5 m |
Minimum accuracy |
0.3% of the measured value |
Velocity resolution |
0.1 cm/s |
Maximum sampling rate |
2 Hz |
No. of beams |
4 slanted beams at 25 degrees |
* Maximum range depends on acoustic scattering conditions and transmit power |
Single ping std @ 3 m/s |
0.5 cm/s |
Long-term accuracy (1) |
± 0.3 % |
Minimum altitude |
0.3 m |
Maximum altitude (2) |
255 m |
Velocity resolution |
0.01 mm/s |
Maximum sampling rate |
2 Hz |
(1) Following standard callibration procedures |
|
(2) Bottom-track distance dependent upon bottom type |
Temperature sensor range /accuracy |
-4 °C to 40 °C / 0.1 °C |
Pressure |
Piezoresistive |
Compass |
Solid State magnetometer |
Tilt |
Solid State accelerometer |
AHRS |
Attitude sensor (option) |
IO |
Ethernet (DF21 over serial as option) |
DC Input |
24 V DC |
Operating temperature |
0 °C to 40 °C |
Storage temperature |
-20 °C to 60 °C |
Depth rating |
Bottom track is limited to surface vessels |
Instrument materials |
POM with Titanium fastener |
Instrument weight |
7 kg |
Installation |
Instrument to be flush mounted with hull (sea valve solution) |
Sea valve (option) |
DNV type approval; TAS00002CU |
Sea valve material |
Ductile Iron (body), Bronze (seat) |
Sea valve weight |
85 kg |
Bell housing material |
Steel DIN17121 |
Bell housing weight |
29 kg |
Processor/memory |
Intel i5/8 GB |
Hard disk |
SSD, 256 GB |
Operating system |
Windows® 10 |
Housing |
19" rack-mountable 2 HE |
Dimensions |
482x87x400 mm |
Input |
110-240 V AC, 100 W Max |
Total weight |
7 kg |
Connections* |
Power, Signature ADCP, 2x DisplayPort, 1x LAN, 2x USB, 4x RS232|RS422|RS485 configurable port* |
* Processing unit requires heading and GNSS input over Serial or Ethernet |
Acquisition input |
Signature VM - binary |
Configuration |
Signature VM ADCP, Alignment offsets, Outputs |
Display |
Vessel track in map, Bottom-track magnitude, direction and depth: (SOG), (COG), Speed Through Water (STW), Mean water column magnitude and direction, 4x depth selectable layer (magnitude and direction), 3D velocity profile (magnitude and direction), 2D vessel cross track current, 24h mean current and direction history (tides), Notes, Echo correlation, Echo amplitude |
Status |
Signature VM BT and VB + NMEA GGA, HDT, VTG |
Online output |
NMEA data formats or binary AD2CP with embedded NMEA. DF21 BT proprietary (optional) |
Post processing |
Signature review software (optional) |
Multi vessel display |
VM Operations streaming data and display (optional) |
*Please note that the package includes the VM Operations acquisition software. The post-processing Review software is optional. |
Signature333 VM
4-beam concave head
Short, no room for battery
16 GB data logger
Pressure sensor 0-50 m, 0.1%
Sea valve: 10 m Ethernet cable with MCIL8F-PWR/RJ45
Other: 20 m Ethernet cable with MCIL8M and MCIL8F
Sea valve (option)
Pole mount bracket (option)
Hull mount bracket (option)
Compass and Tilt sensor
AHRS
