boat frigate navy Portuguese ship war warship chain dock docked fregat front harbour military perspective power rope safety security army cruiser cutout gun guns isolated marine ocean panzer sea turrets wave Battle Cruiser battleship Navy ship US Navy world war II antenna channel cruise destroyer mast naval orange radar silhouette sparkling sunset underway water Baltic corvette missile Poland surface-to-air warfare weapon flag cannons city England english Great Britain HMS Belfast landmark London moored river thames tourist attraction Tower Bridge aecurity Błyskawica dinghy jolly-boat launch life-boat line nautical pinnace rescue safe see vessel work yawl yowl