With a name that suggests that it takes the enemy prisoner, the Mark 60 CAPTOR isn't a missile, but a mine. It won't take any prisoners when it detonates, though. Every mine is actually a steel shell which houses a torpedo, and sits at the bottom of the sea waiting for a target to appear.
When they're put into the water, they can remain there in an operational state for several months until an enemy target appears - at which point it will self-launch.