Posts Tagged ‘GPS’

Heeling Error

Saturday, December 22nd, 2012

In these days of GPS navigation, people tend to ignore changes in deviation caused when the boat heels and lumps of structural iron alter their relationship with the compass.

Don’t believe the helmsman

Tuesday, February 7th, 2012

Every skipper should be aware that helmsmen or even women rank among the world’s most chronic liars.

Datums for GPS

Saturday, January 1st, 2011

If you’re still struggling with chart datums for GPS, YM’s postbag indicates that you’re not alone! Search an Admiralty chart and you’ll find a statement like this one