On the island after Salazar, go right to the edge of the first camp you come across( The one where you verse J.J. for the first time)(J.J. is the Chain gun guy). Get out a weapon with long range sight and aim out to sea past the big rock's. You should be able to see Battleships all along the horizon( The weapon I used to see out was a Infinite rocket launcher but it should work with all weapon's with long range)