Keywords: USS Eider (AM-17), USS SC-25, USS SC-45, USS SC-356, USS SC-47, and USS SC-40.jpg The US Navy minesweeper USS Eider AM-17 left with submarine chasers alongside in a North Sea port probably Kirkwall in the Orkney Islands during the clearance of the North Sea Mine Barrage The leftmost submarine chaser is SC-25 but SC-254 SC-256 and SC-259 participated in clearing the mine barrage The other submarine chasers are left to right SC-45 SC-356 SC-47 and SC-40 United States Navy photo http //www navsource org/archives/12/150025 htm 1919 United States Navy photograph PD-USGov-Military-Navy Original upload log en wikipedia USS+Eider+ 28AM-17 29 2C+USS+SC-25 2C+USS+SC-45 2C+USS+SC-356 2C+USS+SC-47 2C+and+USS+SC-40 jpg 2011-02-28 04 03 Mdnavman 900×590× 119661 bytes <nowiki> The United States Navy minesweeper USS Eider Minesweeper No 17 left with left to right Submarine Chaser No 25 Submarine Chaser No 45 USS SC-</nowiki> United States Navy in World War I Ships built in 1918 Lapwing class minesweepers World War II auxiliary ships of the United States Black and white photographs |