WSM6 Manual
Document Ref: UM-8270-000
Issue: A Rev 0
Section 3
10 October 2011
3.2 WSM6
Sonardyne's WSM6 offers wideband navigation replies which are capable of significant
improvements in ranging accuracy and repeatability, especially in responder mode. It also retains
compatibility with existing "HPR" and LUSBL range-bearing acoustic navigation systems. The
acoustic signal level transmitted by the Type 8270 is strongest on axis and useful over a 90 degree
cone. It is usually mounted with the transducer pointing upwards - typically for marking small
ROV’s.
In circumstances where orientation in the general direction of the ship cannot be guaranteed, such
as for longer ranges in shallow water, the omni-directional response of the Type 8271 Omni-
directional Transponder is recommended. The Type 8271 has the same functionality as the 8270
Directional unit, but is generally only depth rated to 1000m where as the Directional unit is generally
rated to 4000m, and has a lower transmit acoustic source level on axis but a wider omni-directional
beam-pattern (±120º).
The WSM6 offers the following benefits to the user:
High capacity Nickel Metal Hydride Rechargeable battery with 20 hour operating life at
1 pulse/second and rapid-charge capability by external connector.
All "HPR-300" and “HPR-400” channels are supported.
Sonardyne tone channels are available using shorter pulses, thus giving extended
battery life.
All Sonardyne wideband reply signals are supported giving better range accuracy and
repeatability.
External connector for "Responder" mode trigger, external power supply, charger and
communications interface.
Type 8270 in general has a 4000 metre depth rating.
Type 8271 in general has a 1000 metre depth rating (dependent on depth sensor where
fitted).
Depth sensor option (no sensor on 8270 versions 8270-000-01, 8070-000-08 and 8271
versions 8271-000-01 and 8271-000-02).
ON/OFF feature via external switch.
Acoustic commands to enable and disable the transponder and to enable the Depth
Data reply.
Easy-to-use configuration software “WSM Terminal”.
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