C-Max CM2 User Manual - page 7
CM2 User Manual: Magnetometer Supplement
To test the system before launch start MaxView (or third-party sonar acquisition software) and SeaLINK, then
start the CM2 towfish. After a delay of a few seconds power will be automatically applied to the
magnetometer and sampling will begin.
Launch and Recovery
The magnetometer towfish and its sidescan interface cable are relatively buoyant. This means that at survey
speeds the altitudes of the magnetometer and CM2 towfish are similar. It also means that the magnetometer
can be launched first or last depending on preference.
Refer to the CM2 User Manual for advice on launching the sidescan towfish.
Lower the magnetometer towfish into the water.
CAUTION: DO NOT DROP THE MAGNETOMETER TOWFISH INTO THE WATER OR ALLOW IT TO
IMPACT THE TOWING VESSEL.
When recovering, it is normally more convenient to recover the CM2 towfish first.
Operating the Magnetometer
Consult the Marine Magnetics magnetometer operation manual. Note that the optimum altitude and line
spacing for the magnetometer will probably not be optimum for sidescan sonar and vice versa. A
compromise is normally required.
Using the CM2 Towfish without the Magnetometer connected
CAUTION: IF THE CM2 TOWFISH (WITH MAG OPTION) IS USED WITHOUT THE MAGNETOMETER THE
4-WAY CONNECTOR ON ITS REAR BULKHEAD MUST BE SEALED USING THE DUMMY PLUG.
The CM2 towfish automatically disconnects the power to the magnetometer connector if the magnetometer
has not responded within approximately 10 seconds. This protective mechanism is intended to prevent
further electrolytic corrosion of the connector if the dummy plug has been accidentally omitted: it is not a
substitute for proper use of the dummy plug.
© C-MAX Ltd 2017
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