freedom of warship

Da constitutional right dat allows you to board any of our nation's naval battlewagons whenever and however you please.

In the first Casey Ryback film "Under Siege", mercenary William Strannix takes the whole "freedom of warship" to a preposterous degree --- perhaps he did indeed have the right to go aboard the USS Missouri, but that didn't entitle him to take over the ship or harm the crewmembers.