[DG] [DG11] Raymarine speed display issue - BAVARIA 42

[Derek - Raymarine - Moderator]

Hi Monty,

SeaTalk is a basic 3 wire system, red = 12v, Yellow = data and Shield or screen = 0V, it generally self recovers when a fault is removed, so the key is to tace the faulty cable or unit.

The cables can be cut and rejoined without any issues - as long as the joins are made correctly and are of good quality and do not introduce any resistance.

There is a simple test for seatalk operation - turn the backlights ON on one instrument display, and they should come ON on all instrument displays. If they do, then the SeaTalk network is operating normally and any faults will be attributed to one of the instruments or it's transducer.

If one or a series of displays do not illuminate, this will help you track down the faulty display or connection or cable.

The GPS data could be from one of two sources, if an NMEA GPS antenna is used, then the c70 is likely converting that to SeaTalk and distributing it, or if the GPS antenna is a SeaTalk variant, then it is broadcasting it directly onto the network.

Select the DATABOX page on the c70 and look at what databoxes have correct data in them instead of dashes, this will also give you a clue as to what data is available on the network.

Regards
Derek