Magnetic Compass Deviation and Correction Unji Denham 1:150

Denham 1:150

Timor Leste - North Coast - Approaches to Hera 1:10

Australia - East Coast - Queensland - Approaches to Gladstone 1:37 500

This will allow you to practice those knots you need to know

9 x 5 x 25cm

Magnetic Compass Deviation and Correction Unji Denham 1:150In addition to dealing with the properties of magnets and the earths magnetism, three chapters are devoted to the magnetism of the ship, the third explaining in detail the reason for, and composition of, the nine rods. The relation of the components P, Q and R are the rods to the various co efficient are fully explained. The principle of the deflator and a discussion of the limits of accuracy are also included, together with a great deal of hitherto