In the Perfect Position to Fail

Why do precisely plotted satellite positions keep leading us astray?

For centuries, navigators have been coping with two key variables that convey major consequence. The first is the quest for an accurate position fix, and the second is the hope that the chart they’re using is an accurate representation of their surroundings. Up until a couple of decades ago, cartographers were winning out and chart accuracy trumped sextant-derived fix accuracy. The tide has turned.

Continue Reading

More Seamanship

Slicing, Dicing Abrasion Data

 Subscribers OnlyFor testing, we used the same abrasion rig we used to test sewn eyes and rope (see PS March 2015). A modified wood...

Reading the Weather

 Subscribers OnlyThe air surrounding us on the surface of the earth weighs about 1.2 kilos per cubic meter, and when we stack up these...

Father’s Rite of Passage

Last summer, I asked my father to join me and my two boys for an overnight passage to the Keys. At the last minute,...