Although there is not strategy guide or book available for the game, below are some tips from the testers. Do not waste your multi-head missiles unless you have good radar contact. As soon as the enemy gets near the island, begin attacking. Make sure to sink the ships, otherwise, they will repair and come back to haunt you. You might want to leave a fleet of missile subs near an island for garrison duty.
Super carriers are very hardy and take a long time to sink.
Move the carrier right next to the enemy, and it can act as a spotter for a fleet farther away with a long-range weapon. The choppers are much more accurate hitting subs than the ships are. Always target warships before carriers. Carriers have no weapons usually have already launched all their aircraft when you are in firing range. They are no threat after the planes are launched and take and enormous amount of firepower to destroy.