Thanks. I don't recall my SCX-20 having ever lost signal since it was placed in service in May 2020. However, I don't make a practice of being on the boat during thunderstorms, which we don't get too often. Yesterday was unusual because I was planning to go offshore and it was pretty apparent we would have to run through a line of fast-moving thunderstorm cells. We just waited an hour for it to move through. I should note that my DRS25A-NXT was doing an excellent job showing the storms with better definition than the NOAA weather radar and Accuweather and Weather Underground radar maps I was checking on my phone.
The nearest cell was probably only two or three miles away when we left. I was using the autopilot so it was very obvious when the SCX-20 dropped. It did demonstrate that I need to do an alignment of the heading data from the Airmar WX220 that I have on board because the autopilot switched over to it and it was 20 degrees off.
We got about 5-6 miles away from the storms, the SCX-20 started working normally so I guess it was just messing with the GPS reception. I would imagine that the SCX-20 needs all four of its GPS sensor to have a good lock in order to calculate the heading, which is why it would stop generating heading output while the other GPS units on the boat (the TZT 3 displays, my AIS transponder, and the WX220) were still outputting position.
