This book explores the fundamental principles behind the operation of ships and submarines. It delves into the engineering, physics, and design that allow these vessels to navigate the world's waters, from the buoyancy that keeps ships afloat to the complex systems that enable submarines to submerge and resurface.

The 'How It Works' series is generally regarded as an accessible introduction to complex topics for young readers. This volume likely provides clear, concise explanations suitable for children interested in vehicles and engineering. The focus is on educational content, aiming to demystify the technology behind ships and submarines for a curious audience.