A MK-46 exercise torpedo is launched from the deck of Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89) during a torpedo launch exercise in Philippine Sea.

A MK-46 exercise torpedo is launched from the deck of Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89) during a torpedo launch exercise in Philippine Sea.
More info here:https://commons.wikimedia.org/wiki/File:MK46_torpedo_launch.jpg