VESSEL-MOUNTED

09/19/2024

VM Coastal - 1000|500|250 kHz

The Signature VM package delivers vessel-mounted ADCP capabilities basedon present-day technology

The VM Coastal safeguards data quality, opens up new and unprecedented opportunities to the scientificcommunity, and offers operational convenience and reduced complexity.

The VM Coastal package includes the Signature1000, 500 or 250, allowing for great versatility in both the vesselmounted and bottom-mounted configurations. By using a state-of-the-art and user-friendly vessel-mounted
package, measurement errors and initial installation time can be greatly reduced.

Highlights
A coherent system that is quick andconvenient to operate
Fifth echosounder beam for sedimentmeasurements down to the bottom(1000/500)
Ethernet ADCP and GNSS hardware, offeringtight network timing
Simultaneous current and depth informationin one place (1000/500)
Outstanding bottom-track performance,even under challenging conditions
Straightforward data-acquisition andprocessing software

Applications
Coastal surveys, up to 200 m depthPort and harbor mapping
Sediment transport studies
Large-scale mixing studies

Technical specifications
Water velocity measurements for Signature VM 1000 KHZProfiling range*

30 m

Cell size

0.2–2 mMax no. cells

256

Min. blanking

0.1 m

Minimum accuracy

0.3% of the measured value ± 0.3 cm/s

Velocity resolution

0.1 cm/s

Maximum sampling rate

14 Hz

No. of beams

4 slanted at 25 degrees*) Maximum range depends on acoustic scattering conditions and transmit power.

Water velocity measurements for Signature VM 500 KHZProfiling range*

70 m

Cell size

0.5–4 mMax no. cells

256

Min. blanking

0.5 m

Minimum accuracy

0.3% of the measured value ± 0.3 cm/s

Velocity resolution

0.1 cm/s

Maximum sampling rate

6 Hz

No. of beams

4 slanted at 25 degrees*) Maximum range depends on acoustic scattering conditions and transmit power.

Water velocity measurements for Signature VM 250 KHZProfiling range*

200 m

Cell size

1–8 m

Max no. cells

256

Min. blanking

0.5 m

Minimum accuracy

1% of the measured value ± 0.5 cm/s

Velocity resolution

0.1 cm/s

Maximum sampling rate

2 Hz

No. of beams

4 slanted at 20 degrees*) Maximum range depends on acoustic scattering conditions and transmit power.

Bottom velocity measurements for Signature VM 1000 KHZSingle ping std @ 3 m/s

0.5 cm/s

Long-term accuracy± 0.1% / ± 0.1 cm/s

Minimum altitude

0.2 m

Maximum altitude

30 m

Velocity resolution

0.01 mm/s

Maximum sampling rate

4 Hz

Bottom velocity measurements for Signature VM 500 KHZSingle ping std @ 3 m/s

0.5 cm/s

Long-term accuracy± 0.1% / ± 0.1 cm/s

Minimum altitude

0.3 m

Maximum altitude

70 m

Velocity resolution

0.01 mm/s

Maximum sampling rate

2 Hz

Bottom velocity measurements for Signature VM 250 KHZSingle ping std @ 3 m/s

TBA

Long-term accuracy

TBA

Minimum altitude

5m

Maximum altitude

205 m

Velocity resolution

0.01 mm/s

Maximum sampling rate

1 Hz

Depth measurements for Signature VM 1000 kHz
No. of beams

1 vertical

Maximum sampling rate

2 Hz

Max. range

30 m

Vertical resolution / accuracy

0.001 m / 1% of the measured value****) Assuming a constant speed of sound

Depth measurements for Signature VM 500 kHz
No. of beams

1 vertical

Maximum sampling rate

2 Hz

Max. range

70 m

Vertical resolution / accuracy

0.001 m / 1% of the measured value****) Assuming a constant speed of sound

Depth measurements for Signature VM 250 kHz
No. of beams

N/A*

Maximum sampling rate

N/AMax. range

N/A

Vertical resolution / accuracy

N/A*) Depth measurement via the 4 slanted beams.

Echo intensity Signature VM 1000 and 500 kHz
Sampling

Same as velocity for slanted beams

Resolution

0.5 dB

Dynamic range

70 dB slanted beams

No. of beams

4 slanted at 25 degrees

Beam width

2.9°

Echo intensity Signature VM 250 kHzSamplingSame as velocity for slanted beams

Resolution

0.5 dB

Dynamic range

70 dB slanted beams

No. of beams

4 slanted at 20 degrees

Beam width

2.3°

Echosounder option for Signature VM 1000 kHz
No. of beams

1 vertical

Maximum sampling rate

2 Hz

Max. range

30 m

Resolution

3 mm - 0.25 m

Number of bins

10,000Transmit pulse length

16 μs - 0.5 ms

Transmit pulse

Monochromatic or pulse compressed (25% BW)

Resolution / dynamic range

0.01 dB / 70 dB

Echosounder option for Signature VM 500 kHz
No. of beams

1 vertical

Maximum sampling rate

1 Hz

Max. range

70 m

Resolution

6 mm - 0.5 m

Number of bins

11,000Transmit pulse length

32 μs - 1 ms

Transmit pulse

Monochromatic or pulse compressed (25% BW)

Resolution / dynamic range

0.01 dB / 70 dB

Echosounder option for Signature VM 250 kHz
No. of beams

N/A

Maximum sampling rate

N/A

Max. range

N/A

Resolution

N/A

Number of bins

N/ATransmit pulse length

N/ATransmit pulse

N/A

Resolution / dynamic range

N/A

Other, Signature VM ADCP
Temperature sensor range /accuracy-4 °C to 40 °C / 0.1 °C

PressurePiezoresistive

Standard range

0-300 m (inquire for options)

Accuracy/precision

0.1% FS / better than 0.002% of full scaleCompass and tilt

Solid-state magnetometer

Data recording

16 GB (inquire for options)

Data cable

10 m Ethernet cable (inquire for options)Other, Signature VM ADCP
IO

Ethernet

DC Input

15–48 V DC

Environmental, Signature VM ADCP
Operating temperature-4 °C to 40 °C

Storage temperature-20 °C to 60 °C

Vibration

IEC 60068-1/IEC60068-2-64

EMC approval

IEC 61000

Depth rating

300 m – Bottom track is limited to surface vessels

Connectors

Straight fitted MCBH6F (Ethernet)

Housing

Small instrument housing

Material

POM with titanium fasteners and additional, reinforced
transducer cups for VM 250

Processing unit
Processor/memory

Intel i5/8 GB

Hard disk

SSD, 500 GB

Operating system

Windows® 10

Housing

Half 19" 2 HE case

Dimensions

265x110x340 mm

Input

24 V DC, 20 W typical. (230|120 V AC adaptor supplied)

Total weight

5.75 kg

Connections

Power, Signature ADCP, AN_GNSS, 2x HDMI, 2xLAN, 3x USB

Nortek Signature VM acquisition software
Acquisition

Signature VM - binary, GNSS compass - binary

Timing< 0.6 s, IEEE1588/PTP for absolute timestamping (GNSScompass/Signature VM)

Configuration

Signature VM (partly)Advanced Navigation GNSS compass

Display

Vessel track in map, Bottom-track velocity, Bottom-track
depth, Velocity magnitude and direction, Echo amplitude,
Echo correlation, Vertical depth, Vertical echogram; corrected
relative volume backscatter (1000/500)

StatusSignature VM + AN_GNSS compass

OutputOnline: NMEA data formats. Offline: CSV, ASCII VMT, MATLAB,MATLAB VMT, MATLAB QRev, KML*) Signature1000 and 500

GNSS compass
Brand and model

Advanced navigation GNSS compass v2

Position accuracy (with RTK)

Horizontal: 0.01 m, Vertical: 0.015 m

Heading accuracy

0.2°

Supported navigation systems

GPS L1_L2, GLONASS G1_G2, GALILEO E1_E5b, BeiDou B1_B2

Heave accuracy

0.05 mGNSS compass
Communication

Ethernet 10/100

TimingPTP, NTP timeserver functionality

ProtocolNMEA 0183, AN Packet Protocol, TSS1 Simrad, RTCM

AHRS option
Accelerometer dynamic range±2g

Gyro dynamic range± 250°/sec

Magnetometer dynamic range± 1.3 GaussPitch and roll range / resolution± 90° (pitch), ± 180° (roll)/0.01°

Pitch and roll accuracy± 2° (dynamic)3), ± 0.5° (static, ± 30°)

Heading range / resolution

360°, all axes /0.01°

Heading accuracy± 3° (dynamic)3), ± 2° (static, tilt < 20°)

Sampling rate

Same as measurement rate