As far as Im concerned, unless a CV was kept in reserve for a major battle/attack (WW2), they were always used to carry out OFFENSIVE Operations re is no reason to hide CVs. Case in point...other night I switched from Nit to Bish cuz no squaddies were on and to fly with some of my Bish friends...they had 2 CVs SOOOOOOOOO far up the NE side of the map that when the Nits were attacking the Port in questions, after the 2 of us that were there defending were knocked out of action in GVs/Manned guns, the nearest AF was 3 sectors away and even rushng the closest CV t the port was 3 sectors away. Therefore the base was lost without even a stout defense put up. The 2 of us that said screw it and upped from said CV to try and get there also gave the NME a direction to where to look for CV and it was promptly sunk because not a single other person hopped in guns or anything. So, long story short...your gonna lose the CV either way so why not Keep it where it can be used to stem the tide of an attack and at least give yourself a chance at keeping the port where if the CV is sunk, youll get it back in 15 min. And i guess in the game it would be used as a defensive weapon for only Port defense...