Show them landlubbers that y'er the baddest barnacle to navigate the seven seas. There aren't many naval battle games out there, well, not as many as shmups, at the very least, but Warship sets itself apart with the feel of a relaxing cruise in one minute, and an exciting cannon-spamming shooter in the next.
Damaging and sinking enemy ships would get them to drop chests and barrels full of booty. Amass some wealth with those drops and you'll be able to get new ships or upgrade existing ones. The game will take place in the seas of the Mediterranean to the Pacific, and you get to choose where to sail and fight.
Warship is available in the App Store for US 2.99.
How about this one?