Navigational Aids (Great Inventions) 1st edition

This book takes young readers on a fascinating, richly illustrated journey of historical exploration and technological discovery. Their aim is as clear as their challenge is worthy. Step into the life and times of the inventors of the maps, charts, celestial aids and much more. Imagine the world before these great inventions existed. Learn what the inventors did, why they did it, and how they succeeded. Above all, consider the far-reaching impact of their accomplishments and what it would be like without them!