There is an enemy submarine located at an unknown integer somewhere on the number line. The submarine is moving at a constant integer distance per minute (also unknown, and can be positive or negative). Every minute, you can fire a missile at an integer on the number line in an attempt to destroy the submarine.

Is there a strategy to strike the submarine in a finite amount of time?

Assume that you move first and that you can fire missiles at the number line for as long you need to.