Quote Originally Posted by babj615 View Post
Ridiculous!
Only ridiculous if you are assuming accuracy and you or the device cannot manage it.

Lat Lon is a projection, you don’t say what datum you are using. The current local one for your area is NAD83 and like other national datums across the world it’s regularly adjusted over time (epoch) so even it has multiple versions. You should only use NAD27 there if you are using old maps or have obtained coordinates in NAD27.

Here’s a description from your responsible authority the NGS of an NAD83 2011 adjustment which specifically mentions tectonic activity and earthquakes in Western US: [Only registered and activated users can see links. ]

And this is where you are going next: [Only registered and activated users can see links. ]

Garmin devices normally have a selection for NAD83, however the transformation is simplistic, the epoch date isn’t specified and it isn’t updated.

So forget all the nonsense about accuracy, you won’t get it. Just use it and enjoy whatever it is you are doing they are great devices to support almost any activity.