These tables were designed for air navigation where weight and space are at a premium, however, they are very popular with sailors too due to the fact that Vol.

Many books on celestial navigation take shortcuts in explaining concepts; incorrect diagrams and discussion are often used for the sake of moving the student al

While Americans are generally aware of China's ambitions as a global economic and military superpower, few understand just how deeply and assertively that count

This famous set of mathematical tables was first published in 1803. It has been a bestseller ever since, and despite developments in electronic navigation it re

A pad of plotting sheets for the Northern Hemisphere.