Specifications

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- For the User Grid, you are asked to supply a projection
type (Transverse Mercator, Lambert Conic, Stereo-
graphic, Oblique Mercator or Polyconic), coordinates
of origin, scale factor, unit to meters conversion and
false Easting and Northing at origin
Notes on Coordinate Systems:
- The ProMark3 always uses the WGS 84 coordinates to
locate the features and waypoints on the Map screen, even
if you select some other coordinate system/datum.
- The coordinate systems and datums used to display any-
thing on the Map screen are only for display. When you
select some other coordinate system/datum, only the num-
bers of the coordinates of a feature/waypoint are changed.
The map screen is not changed in appearance.
Map Datum
This option allows you to define a primary map datum,
and also a secondary map datum if you need one.
A map datum is a geographic reference that ProMark3 will
refer to to calculate the coordinates of your position.
ProMark3 holds more than 70 different map datums in its
memory.
After selecting the Map Datum option from the Setup
menu, tap the map datum that applies to your country and
working area.