Pblais is exactly right.
I used radar daily for years in the late 70's so I wasn't a stranger to it when I bought my current
one a couple years ago. Still, I played with it at the dock
for hours, and used up a ton of amp hours fiddling with it during clear daylight sails
. Then, when I recently bought the autopilot, which supplies heading info to the radar and opened up the ability to overlay radar on the chart plotter, and use MARPA, and other features, I spent another 8-10 hours playing, acquiring targets, etc. so it will be second nature when I really need it.
I've been in situations where I needed to sail into a narrow and busy harbor entrance in high winds and zero visibility, with only an ancient handheld gps, compass
, and the sound of a foghorn at an obscured light, with the sounds of motors from invisible ships around me. That is not a good time to learn how to use electronics
Sailing blind at 8.5 knots, hoping the pointer on the gps is really pointing at the opening in the several mile long breakwater, is no fun. Fortunately, the LA Light appeared through the fog
35 seconds before we passed through the entrance. 200 meters either way, and we would have smashed into the breakwater. At that point, the admiral approved the budget