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Note from the author: As part of training for my 5-star I felt that I should fairly accurately know, without a lot of involved mathematics, how long it would take to paddle a certain distance in a variety of tidal conditions.

These are a series of crib notes or cheat sheets for various calculations relating to tide, currents and speed made good.

This indispensable reference tool lists and defines more than 400 terms and concepts concerned with the tidal phenomena and its measurement.

By: Ralph Keller - Coast Mountain Expeditions

A nice primer for anybody looking to plan a trip that takes you through potential tidal currents or tidal overfalls.

You will also find information on how to read Canadian Tide charts as well as a good explanation on the Rule of Thirds.

The word "tides" is a generic term used to define the alternating rise and fall in sea level with respect to the land, produced by the gravitational attraction of the moon and the sun. This article explains these relationships and how tides work. Probably the most in-depth article that I have ever come upon.