Everything you need to know about using a nautical chart. A lot of stuff you don't need to know and way more than you ever thought you would know. So then, the last book you'll ever need about reading nautical charts, even after you switch completely to electronic charts, which Calder recommends against.

You can't just read it, though, it's far too dense and most is not immediately applicable, so buy a copy, read it quickly then get it out ahead of your next passage (or whatever), use it for planning then take it with you. Get a small magnifying glass, too. ( )