Sea power: PAN from MS of captain on his bridge to an officer and a sailor on a lower level. Shot of deck gun barrel being hauled aboard a freighter. Cut to two workmen elevating and traversing deck gun in evidence. PAN of freighter from stem to stern. Cut to harbour scene, a passenger ship in background, other smaller ships sailing by. MS PANs of hospital ship "St-David" in harbour. MS of an other hospital ship in harbour and cut to some men on deck. LS of freighters with two observation balloons floating overhead coming into harbour.