There seems to be a glitch in this game. Once someone bombs the carrier, any hits come up at the same time and then the game is over. I've seen my name come up as hitting the carrier when I never even dropped my bomb.
Think if you are close to the carrier when it hit you got a hit to.
1airplain do 10%
2 airplain do 20% but if both of them hit whit the bomb its 40%
if 5 airplain stay near the carrier but only 1 hit whit the bomb its 50%