That's true with me as well. I don't often id my targets either. It's not necessary while manual targeting. (I sometimes don't hit my intended target either. The last sinking I did was revealed to me when I saved the game and exited. Suddenly it said 9000 tonnes sunk. I had missed my target and hit a troop transport ship of sorts. A long range night surface attack in NYGM and a visibility of max 4000 meters. I only saw some of the ships in the convoy's fringes. I did see some fire but I thought it was some of the smaller ships that were on fire because of the stormy seas.)
I love SH3