If you are having trouble with your GPS unit or understanding how to use the provided coordinates from
Atlantic Mapping's charts then please read and review the following information.

SETUP
Set datum to 1927 NAD conus                    Set positioning format to HDDD MM SS.S

POSITIONING FORMAT
Next check your charts pre-selected coordinates, some older versions supported the following positioning
format... hddd mm ss, we have found this positioning format to not be as accurate as what we use now.
On all newer production charts you will find we are now using the following positioning format: hddd mm ss.s
this 10th of a second really helps when you are trying to locate a tight spot.

SATELLITE SIGNAL
Make sure you have at least 4 strong satellite signals and good batteries. In some cases a better external
antenna can help. In open water, signal coverage is usually easy to acquire. 

TECHNICAL NOTES

Tech Note: Chart creation is very technical and dealing with Datums and GPS in general for accuracy sake. Atlantic Mapping, Inc. go through many tests with their GPS charts to insure they are correct.
However, not all mapping is done the same and at no time do we commit that any other company
or competitor's mapping is created the same or is compatible in nature. When inputting pre-selected
coordinates from Atlantic Mapping, Inc charts, a Atlantic Mapping, Inc hard copy chart should also
be used to insure accuracy.