NECPA (National Emergency Command Post Afloat) was a concept to use two WWII warships as a refuge for the President during times of great tension, either prior to a nuclear war with the USSR or as one was already starting.

(USS Northampton (CC-1), an unfinished WWII cruiser, was one of the NECPA ships.)

(USS Wright (CC-2), formerly a WWII aircraft carrier, was the other NECPA ship.)