[Single Player] This achievement is best accomplished on the first Ship Challenge mission where you control the Japanese battleship. Set your damage parties to water, fire and weapons, set a waypoint to your rendezvous, and then take control of the artillery, press for your binoculars, and take out ships as they appear. Don’t concern yourself with evading torpedoes as you won’t get hit enough to sink your ship. Another Japanese ship will eventually show up that you have to keep alive to win, but you can’t control it. Make sure you get 10 kills because if the other ship fires the last shot that sinks an enemy, you don’t get the credit.