Explores the science and engineering of machines at sea including ships, boats, catamarans, aircraft carriers, seaplanes, and submarines. Includes color photographs and illustrations, a glossary, and additional resources.

What do engineers do? -- Ships -- Boats -- Hovercraft -- Hydrofoils -- Catamarans -- Aircraft carriers -- Personal watercraft -- Seaplanes -- Submarines -- Submersibles -- Diving gear -- More magnificent machines.