Sunken submarines Thetis and Sailfish are seen rebuilt, renamed and back in service.
Rescue attempt by lifeboats and the Royal Navy to save the crew of a sunken submarine off North Wales.
Mrs A J Powell launches a the new submarine HMS Thetis at Birkenhead.
HMS Thunderbolt arriving to unknown British port.
Re-enactment of Zeebrugge Naval Raid by Royal Navy during WW1.