Compass Deviation & Electronics
The proximity of electronics to the compass concerns me especially since my experience with installing a hailer below decks and a remote speaker/mike near the helm. First, what David Knowles said about deviation in a particular direction is correct and that's something to check for.Second, the influence on the compass depends on the quality of your compass. The units that come with the new boat are, well, how do I put this, low cost. The problem with a low cost compass will be they aren't necessarily that sensitive. If you check the specs on a compass you'll see some differences in sensitivity with the higher priced units. When I go through pea-soup fog I want a really good compass and one that doesn't have errors from nearby electronics. Besides my compass (a German made Venus), I use radar, GPS, depthsounder, radar reflector, and last but not least, a loud hailer hooked up to a good horn to broadcast the proper signal.In my Standard hailer speaker-mic installation I found it influenced my compass as far away as five feet!!! That says something about either the compass, speaker-mic, or both.Also, the wire pairs near the compass should be twisted.