Cool. Just wanted to make sure

When I'm surface the hydrophone is greyed out too, so I thought perhaps it was the same situation. You could only use them in certain situations. I believe you can only use the radar surfaced right?
Also, I know you have to turn off the radar, but isn't there a bug with stock SH3 where even when you turn it off it isn't always off. You have to literally turn it off a certain way to ensure its off. I read that in the community manual I believe.