I get why this tattoo bothers me so much. She is referring to one, “a” SINGLE “Battleship” (which also doesn’t need to be capitalized unless it’s supposed to be a poetic allusion to the game). Yet she says “mine keep sinking”
If it were a fleet of battleshipS or a sequence of battleshipS such as replacing the last one every time it sunk, then “keep” would be effective. However with one battleship, it should be keeps. Mine keeps sinking.
Man that’s annoying. Add an “s” for the love of God.