This version is played in the same way as the original so, before starting, you have to place your ships over the grid and wait for your opponent to do the same. Once the game has started you have to indicate the coordinates of your shot with a number and a letter. If your shot is successful, a symbol appears telling you to keep trying your luck around that area to sink that specific ship.
As Sea Battle 2 is a game played by thousands of people every day, you won't have any problem finding an opponent at any time. The good thing about it being online is that you'll always have someone to play with and you'll know they won't be able to cheat by trying to find out where you put your ships. The more games you win, the higher you'll rank, and if you want to practice you can play against the AI.
Additionally, this app lets you stay in contact with your opponents so you can chat while you play. That way, you can make friends and get to know people enjoying a game that's as entertaining as it is frenetic.