 "Nautilus" initially carried 186 naval mines, though this was later increased to 205, while "Albatross" had a capacity of 288 mines.In 1918, "Nautilus" was rearmed with two guns, four anti-aircraft guns, twenty-four machine guns, two flamethrowers, and four mine-launchers, in addition to her normal capacity of mines.Her new armament was intended to allow the ship to support amphibious operations.