USS Fortitude (AMc-81) was an Accentor-class coastal minesweeper acquired by the U.S. Navy for the task of removing mines from minefields laid in the water to prevent ships from passing.

Fortitude was constructed as an Accentor-class coastal minesweeper just prior to World War II.

She was assigned as USS Fortitude (AMc-81) on 17 May 1941.

However, on 20 April 1942, prior to completion as a coastal minesweeper, she was reclassified USS YDT-2, a dive tender, and the name "Fortitude" was canceled.

Sold 31 January 1950