This word template can be changed as you like - and adapted for any foreign language really - but it works well with German verb conjugation. Yet, feel free to make your own categories for the rows and columns.
Page 1 includes your own battleship board on which to conjugate the verbs, then you mark your ships with colors or shading. Then the empty one on the bottom will be used for when you play so you can note the conjugation of the verbs again as well as marking the hit ships as you go along.
Page 2 includes instructions and vocabulary used to play the game in German