Get your milk and cookies because I have a story. We were just dealing with a problem on the ICW where we needed to travel over some "skinny" water with numerous shoaling areas. The PO of our boat had installed multi-meters at the helm, nav. station, and aft stateroom so as to see wind, depth, and boat speed from these areas. The Sea-Talk link decided it was time to shut down leaving us with no auto pilot, wind instruments, and GPS at the helm.
We were left with the Chart-plotter, depth, and boat speed. While crossing Port Royal Sound with currents and cross winds, I had to steer 15 degrees into the stream to stay on the "Chart Course" A quick glance at the compass let me know the boat's heading.
BTW while digging through the boat to find the auto pilot components, I just happened to pull out the drawers under the rear bunk. Inside the drawer cabinet near the rear wall was the Flux-gate compass. I had been searching for that for three years. Thinking back, I wonder how many times I left tools, batteries, and just plain metal stuff right next to it or even in the drawer. I'm sure the auto pilot will work better once we get the Sea Talk issue figured out.
All U Get