Battleship's siren, sounded three times approximately

Boat Drill, ship's siren, seven short blasts, one long, pause one long blast (Last blast signals end of drill)

Cruiser's siren, sounded approximately six times

Destroyer's siren, sounded three times, pause, sounded three times, pause, sounded three times

RMS Queen Elizabeth II, ship's siren, four long blasts as ship leaves port, close perspective, with other ships at end