trans is amphibious when napping coms

http://zero-k.info/Battles/Detail/35089 at about 14:40 a trans dives very deep to nap an enemy com in top right corner.

yes it was a douche thing to put the com there in first place but this means in normal sea games coms are pretty vulnerable since most people wont be expecting such a threat.

should this be prevented?

A heavy transport can go into water to get a com but it cannot to drop one off, FYI.