pierdusud - Pier du Sud

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?

Greetings from Canada.

Celestial navigation has the reputation of being complicated, obscure and, depending on your relation to mathematics, bordering black magic.

What is the following number in this sequence: 3, 6, 9, … ?

This is what four inches of paper maps look like.

Here is a great video by the channel Waterlust explaining tidals forces at work.

Kirsten Neuschäfer has rounded Cape Horn and is leading the race.

I need better shoes.

I was searching on rudder removal procedures and came accross two useful videos (below).

Here is a great video from la Fabrique Culturelle on sailboat production in Québec (french only). We can see Jean-du-Sud for a few seconds.