The Practical Mariner's Book of Knowledge: 460 Sea-Tested Rules of Thumb for Almost Every Boating Situation, 2nd Edition New York Circular slide rule

Circular slide rule

Ossabaw Island

All the basics for charting and navigation functions are found in the Primary Navigation Set

Florida 3-D Nautical Wood Chart (Small)

The Practical Mariner's Book of Knowledge: 460 Sea-Tested Rules of Thumb for Almost Every Boating Situation, 2nd Edition New York Circular slide ruleBy John Vigor The Practical Mariner's Book of Knowledge is either the most useful boating book ever designed to entertain or the most entertaining book ever designed to be useful. In its alphabetical organization that juxtaposes wildly disparate entries, you can read about the derivation of fi gureheads where you turned to for recommended thicknesses of fiberglass hulls. In between the whimsy, however, is the essence of centuries of seafaring