In front of the three-deck gunboat 'Duke of Wellington' at the Portsmouth Naval Depot, sailors form into two ranks at the quayside. The front rank kneels. All the sailors take aim and fire twice. They stand to attention before they break into double time and run a curved path away from the quayside. As they do so another two ranks of sailors form and run close behind them. They carry rifles with bayonets. Another group of sailors pass. Three of these sailors beat drums.