This is for a friend:
"80s-era stand-up cabinet game. Had you and one other player flying planes around the screen dropping bombs on ships that passed below you. Each bomb would eat away a certain amount of the ship in a vertical column, if that column got low enough the ship would start leaking. Enough leaks would sink the ship. You could also shoot down enemy fighters that were flying around and get their wreckage to collide with the ships.
I thought it was called Tigersharks, but that name search brings up nothing. Anyone remember?"