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Old 18-08-2008, 15:26   #1
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Gnomonic Chart(s)

Does anyone know of a source for "GNOMONIC CHARTS?" I'd like to have some onboard for when I do long voyages. Lay out a course on the GNOMONIC CHART and then transfer it to a MERCATOR one. When doing a search for it - it only comes up with explanations of what it is. When you contact a Marine outfit, it's almost like they don't know what you're talking about. Any help will be greatly appreciated. Something like a GNOMONIC CHART that has something like 1 degree and 5 degree boxes (lon and lat).

Sailboats do not have ETA's only DESTINATIONS!
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Old 18-08-2008, 15:28   #2
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Old 18-08-2008, 15:30   #3
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They are also called Great Circle Sailing Charts...so you may want to Google that as a search word as well. I guess someone did not like gnomes.

They are sort of a relic from the past. Not that they are not useful. I just think the demand for them is a lot less now that we have all sorts of electronics that do the same thing.

I did find this: https://www.bluewaterweb.com/Nautica...101&GeoID=2083

..and this http://www.waypoints.com/tradcharts/10-3.html
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Old 18-08-2008, 20:14   #4
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Gnomonic Charts

Yea, those are really big charts. But thank you for the suggestion. When I say big, I mean the grids are 25 degrees square on the one sight, and 5 degrees on the other. Neigher chart though scribes the entire chart. If you were to use those you'd have to really do some parallel work. When I was in Japan, I got a bunch from their Hydro Office, the 1 degree and 5 degree ones. I running out of those. Yes, you're very correct, GNOMONIC CHARTS/GREAT CIRCLE CHARTS are a bit old fashioned considering all the new tools we have. But it's so nice to be able to lay out your whole trip on one and then check off your waypoints. At least I think so. I guess I'm dating myself. Shame on me.

Again, thank you for sharing your knowledge and information.

Sailboats don't have ETA's only DESTINATIONS

Be well,
Bruce
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