I was skipper on Honu Kai the mono from Seabbacrical. We lost wind,depth,speed but GPS still worked,bow thruster control had loud alarm going off but still worked.Never came to mind to kill any breakers. Seemed like a light shower.
We had nearly the same issues, i.e., depth, speed, wind sensors, and auto pilot were all dead but GPS working. Bow thruster control with alarm but I didn't recognize the high pitched noise as coming from it - thought it was coming from my Yanmar controls as it was showing a "check engine" warning.
I got nearly all of the instruments back on line and learned something useful in the process. Capt. Jay suggested I unplug one sensor at a time from the NMEA 2000 switch located behind the VHF radio panel (45 Beneteau). Evidently if you have a bad sensor the NMEA 2000 network will not boot up. So you yank out one connector at a time out of the switch until the network boots. Or I suppose you can start the opposite - unplug them all and plug each one back in until it no longer boots. We had a bad transducer. Once it was unplugged the wind, speed, and auto pilot came back to life. A little annoying not to have depth but we were going to places we already know pretty well. And because of the missing depth we skipped Anegada.
.
