By inventing ways to travel on water, people have been able to see and
trade with new lands, conquer new territories, fight great sea battles
and enjoy new sports. This book will help you to understand why ships
have played such an important part in human history. With the aid of
cross-section illustrations and simple experiments to do at home, you
will discover how vessels stay afloat, how a sail works, what keeps a
submarine underwater, how a hovercraft skims on air, the elements of
navigation, and much more.