Hi all, when underway the boatspeed readout on my B&G Hercules 690 system cycles between about 0.2 kts and 8 kts - up and then down over about 3 mins.
A pair of B&G Sonic Speed transducers are fitted to the hull
and leading edge of the keel
(they're epoxied in).
It seemed to work fine before I hauled out just recently but the problem started after re-launching.
I've checked the wiring
between the transducers and the junction box in the control unit and all seems fine. The only thing I noticed is a little seawater seeping in by the fwd transducer.
If anyone has any similar experience or ideas I'd appreciate it.