Our planet is 70% water, much of it unknown. Super Subs explores the latest machines and the people that help reveal the secrets of the last great frontier - the world's oceans. Fascinating topics include:
• how a submarine works
• nuclear subs and sub hunters
• rescuing a sub crew trapped on the seabed
• deep divers and their equipment
• exploring sunken wrecks
• oceans in peril
• a helpful glossary to explain scientific terms and concepts