I think the difference between my two installs is this.:

In the original install the default setting was "On", unless I turned it off.
Thus, even after cotacting water, it would return to the default "On" setting.

In my newer install they changed the default setting to "Off".
Every time it makes contact with water it turns "Off", until you manualy turn it back "On".
The "improvement" was a mistake on somebody's part.

I had the FuMO 29 radar in a previous career and other than the problem of it switching itself off, I found that I had to man it myself because the Radio man wouldn't call out contacts like he does when he sits at the sonar station. Have others experienced this problem?

Nemo

With it only covering a 10 degree arc to the front this particular set would be better off thrown overboard,not only is it practically useless you are lit up like a Roman candle on bonfire night (radar signature wise).The only POSSIBLE use would be in thick fog,but I would probably submerge anyway during said conditions.It could be useful in the bay of Biscay but only when returning! in the odd chance you may pick up incoming planes to your front (very risky) :ping:
My advice,switch off,unplug,rip out,throw into sea.
Maybe the later models are more effective.