A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Pike
Date: 2015 Mar 9, 05:13 -0700
Your nautical chart might well be in a different datum possibly, NAD 83 or NAD27 Canada. If you apply any corrections listed on your chart to the GPS position measured in your drive, you may well find that its position on your chart is now correct. Alternatively, read the datum used for your chart, and apply that to your GPS set. The position obtained should also come very close to the position of your drive on Google maps.
On re-reading http://fer3.com/arc/m2.aspx/Datums-why-place-has-more-than-one-lat-long-DavidPike-mar-2015-g30602 , I think I screwed up. Surely The last two words should surely read 'your chart.' Dave