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S2CR 18/34H USBL

S2CR 18/34H USBL, stainless steel housing
S2CR 18/34H
S2CR 18/34H USBL Directivity Pattern

S2CR 18/34H USBL Underwater Acoustic Positioning System

S2CR 18/34 USBL with a horizontally omnidirectional transducer beam pattern is a universal tool for tracking and communication in reverberant shallow waters, providing data transfer rates up to 13,9 kbit/s over a 3500 m range.


  • Medium-range transmissions in vertical and slant channels
  • Transceiver for USBL positioning
  • High speed communication link
  • Data transmissions and accurate positioning for AUVs and ROVs
  • Underwater acoustic sensor networks

Data Sheets

Underwater Acoustic USBL System S2CR 18/34H USBL Product Information, pdf


Operating Depth 200 m, Delrin housing
1000 m, Aluminium Alloy housing
2000 m, Stainless Steel housing
2000 m, Titanium housing
Operating Range 3000 m
Frequency Band 18 - 34 kHz
Transducer Beam Pattern hemispherical
Slant Range Accuracy[1] 0.01 m
Bearing Resolution 0.1 deg
Nominal SNR 10 dB
Acoustic Connection up to 13,9 kbit/s
Bit Error Rate less than 10-10
Internal Data Buffer 1 MB, configurable
Host Interface[2]  Ethernet, RS-232 (RS-485/422 optional)
Interface Connector up to 2 SubConn® Metal Shell1500 Series
Power Consumption Stand-by Mode: 2,5 mW
Listen Mode[3]: 5 - 285 mW
Receive Mode[4]: 1.4 W
Transmit Mode:
2,8 W, 1000 m range
8 W, 2000 m range
35 W, 3500 m range
65 W, max. available 
Power Supply[5] External 24 VDC (12 VDC optional) or
Internal rechargeable battery (optional)
Dimensions[6] Housing ø113 mm x2018 mm
USBL Antenna ø180 mm x165 mm
Total length 383 mm
Weight, dry/wet Delrin: 5800*/1000* g
Aluminium Alloy: 6000*/1800* g
Stainless Steel: 14000/8000 g
Titanium: 11000*/5800* g

*Marked weights are estimates.

[1] Slant range estimation is based on the measured time delay, slant range accuracy depends on sound velocity profile, refraction and signal-to-noise ratio.

[2] See the S2CR 18/34H USBL Product Information for available standard interface combinations.

[3] User-configurable Listen Mode is only available with a Wake-Up module installed. Power consumption in Listen Mode depends on Listen Mode settings.

[4] Power consumption for the RS-232 interface option. Add 500 mW for the Ethernet interface option.

[5] Contact EvoLogics for more information on power supply options.

[6] Dimensions of a Delrin housing, other builds are slightly larger.

Specifications subject to change without notice.