So. I classed my sonarman on time like a tard way back and now I don't care to level a new one. I've also heard that sonarmen can be skeleton'd. My question is- what's the soft (or hard) cap for sonarmen? What level/base/vets/experts are needed to hit said cap?

The true ability value for the cap would be the most helpful,  but I'm not sure if anyone has that, so in everyone's experiences, when can sonarmen be skeletoned? 

Do people say that they can be skeletoned simply because of the common use of those weird flying things called scouts, or does having a fully crewed sonarman really stop giving any benefits after a certain point? (Does a skeletoned sonarman ever spot as far as a fully crewed sonarman?)