submarine, battleships, missle, warship, cruise missile, gunboat, missiles, destroyers, munitions, ballistic missile, cannon, warhead, harpoon, tirpitz, minelayer, sabot, ordnance, vessels, frigate, ballistic trajectory, merchantmen, bombs, nucular, bombsight, interceptor, armaments, trawler, atom bomb, boats, minisub, nukes, corvettes, skiff, kamikaze, intercontinental ballistic missile, ships, eniwetok, bazooka, dreadnought, graf zeppelin, conning tower, dirigible, gatling gun, inertial guidance, minesweeper, steamers, submunition, rocket launcher, amidships, subs, freighter, propulsion, cruiser, multistage rocket, projectile, periscope, shells, hercules, icbm, gatling, recoilless, sinking, shipmate, howitzers, echo sounder, bathyscaphe, grav, destroyer escort, aircraft carrier, clipper ship, frogman, antiaircraft fire, shoals, cannonball, uzis, sonar, satellites, thermonuclear, guided missile, propellor, gunnery, radioman, thermonuclear warhead, navy, oliver hazard perry, thermobaric bomb, detonating fuse, remus, pocket battleship, sloop, mirvs, atomic bomb, counterfire, airburst, weapons, amphibious landing, engineless, launcher, crewmen, hydrofoils, shuriken, mach, torpedo, guns, submarines, aeroplanes, airplanes, grenades, warheads, warships, cannons, patrols, cruisers, motorcycles, rifles, rockets, trucks

pigboat, sub, submarine, torpedo, u-boat