NH 51159 L-1 retractable deck gun 1918

L-1 alongside Bushnell at Portland, England, 1918. Note L-1’s 3/23 retracting deck gun trained out to starboard, and Y-tube hydrophone immediately behind her open foredeck hatch. Also note the boat boom attached to Bushnell’s side, with the pivoting mechanism at its end and walkway board on its upper surface. (Naval History and Heritage Command Photograph NH 51159)