Except where otherwise stated, all line drawings are of the minelayer or minesweeper design as conceived, and photographs of the ship when built or converted for its mine warfare role. Notwithstanding this intention, however, some photographs show the ship(s) before and/or after this time, as a minelayer or minesweeper, but where the photograph or drawing is of a ship from a specifically designed class, such as the 'Halcyon' class of minesweepers, the photographs are of the ship as commissioned.