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The Catamaran's Polar Curve

Is the Fastest Route the Longest Route?

Is it faster to sail downwind a straight line or to gybe from one tack to the other? The answer, of course, depends very much on the boat performance and the prevailing winds. It is however possible to provide some practical guidance with a little use of theory.

Trade winds.

Preparing for An Ocean Crossing

I am preparing for an ocean crossing. We will be leaving La Rochelle, sail south the Canary Islands, which will be our springboard for the trade winds. We hope to finish our crossing in Antigua, but our final destination is Nassau. It is a bit late in the season, as...

Celestial navigation

What is the sine of one degree?

Prior to the invention of computers, calculators, or even sliding rules, having what is known as a « sine table » was however of critical importance.

How did we find those values?