To use this site, please enable javascript

  • WSM6+ 4k MF Directional transponder
  • WSM6+ 4k MF Directional transponder
  • WSM6+ 4k MF Directional transponder
  • WSM6+ 4k MF Directional transponder
  • WSM6+ 4k MF Directional transponder
  • WSM6+ 4k MF Directional transponder
  • WSM6+ 4k MF Directional transponder

The Wideband Sub-Mini 6 Plus (WSM 6+) is Sonardyne’s latest generation of versatile USBL transponders/responders that support Wideband®2 signals. The WSM 6+ is designed for towfish and ROV positioning, and tracking other mobile targets.

The compact and rugged design is based on the field proven WSM mechanics and is available in MF Directional and MF Omni-Directional versions. The latest Sonardyne Wideband 2 signal technology has been incorporated, which offers superior ranging accuracy and fast USBL position updates.

The WSM 6+ improves on its predecessors by offering full two-way Wideband support – interrogation and reply signals. The configuration is programmable using supplied software and a serial link or it can be configured acoustically via iWand. This allows the WSM 6+ to be configured for use with all of the popular MF frequency acoustic navigation systems.

WSM6+ 4k MF Directional transponder is a 4,000 meter rated unit and features a higher power directional transducer.

*Compatible with Sonardyne Mini-Ranger and Micro-Ranger systems.


Depth rating
4,000 metres
Operational frequency
MF (19–34 kHz)
Transceiver beamshape
Transmit source level (19–34 kHz) (external power) (re. 1 µPa @ 1 m) (battery)
196 dB / 193 dB
Tone Equivalent Energy (TEE*) (external power)
202 dB
Receive sensitivity (dB re 1 μPa)
<80 dB
Power supply
Rechargeable NiMH battery or ext. 24 V via ROV umbilical
Operating channels
All Sonardyne wideband HPR 400 channels
Depth sensor
±0.5% full scale (400 bar)
Operating life ( 1 s update rate, max. power, WB2 )
≥3 days
Maximum update rate
>2 Hz
Quiescent life (Battery)
>35 Days
Connector / 5-Way (standard) / 8-Way (burnwire/motor release )
Subconn MCBH5M / Subconn MCBH8F
Operating temperature
-5 to 40°C
Storage temperature
-20 to 55°C
Mechanical construction
Aluminium alloy, anodised
Dimensions (length x diameter)
429 x 96,5 mm
Weight in air (water)
5.5 kg (3.2 kg)
Battery charger
EIVA LIVE - Dive into EIVA's software and hardware solutions for the maritime industry

Want to attend free webinars?

The ongoing EIVA LIVE webinar series keeps you up to date on our latest software and hardware developments – with the possibility to dive deeper and ask our experts questions. Past webinars have showcased solutions such as our autopilot and software for autonomous hydrographic surveys, as well as new automated ROV inspection modes. 

Learn more