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Old 06 November 2011, 13:14   #1
Country: UK - N Ireland
Town: Portaferry
Make: Avon
Length: 4m +
Engine: 30hp
Join Date: Sep 2011
Posts: 104
GPS Speed meter

Folks having seen a lot of speedometers that use GPS to measure the speed I was think of getting one. As the GPS can only measure speed over ground (SOG) how does that effect its usefulness? Anyone using only a GPS for speed indication? What about EP calculation? Comments.

MI3GTO is offline   Reply With Quote
Old 06 November 2011, 13:47   #2
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Depends. Do you have a specific need to know your speed through the water?

Personally, I am much more interested in how fast I'll get someplace, so SOG is what I want.

Not sure what EP is, so no comment.


jyasaki is offline   Reply With Quote
Old 06 November 2011, 14:59   #3
Country: UK - England
Town: NW Surrey
Boat name: Lady Helen
Make: Avon
Length: 3m +
Engine: Out Petrol 3.5 & 15
Join Date: Aug 2011
Posts: 222
I think EP is estimated position but if you have a GPS you can use that to give your true position.
EnglishLes is offline   Reply With Quote

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