Location' Tab - Garmin GPSMAP 276C Owner's Manual

Main Menu
Setup Tab
'Location' tab of the Setup Tab
Specifying the User Grid Setup
84

'Location' tab

The 'Location' tab allows you to defi ne settings for Location Format, Map Datum, Heading, and Mag-
netic Variation. To open the 'Location' tab, press the MENU key twice to open the Main Menu. Select
'Setup' from the vertical tab list. Then select 'Location' from the row of tabs along the top of the page.
Refer to the Appendix of this guide for more information about location formats and map datum.
Also visit the National Imagery and Mapping Agency at http://www.nima.mil, for more information on
grids and datum.
Location Format – changes the coordinate system in which a given position reading is displayed. You
should only change the position format if you are using a map or chart that specifi es a different position
format or wish to use a format you are familiar with. For more information about using paper maps with
your Garmin unit, refer to "Using a Garmin GPS with Paper Land Maps", available for download at http:
//www.garmin.com/manuals/UsingaGarminGPSwithPaperLandMaps_Manual.pdf.
The default format is latitude and longitude in degrees, minutes, and thousandths of a minute
(hddd°mm.mmm'). For additional information on Loran TD setup, see the Appendix.
Map Datum – allows you to manually select the datum reference used to determine a given position.
The default setting is 'WGS 84'. The unit automatically chooses the best datum depending upon your
chosen position format. Datums are used to describe geographic positions for surveying, mapping, and
navigation and are not actual maps built in the unit. Although over 100 datums are available (as listed in
the Appendix), you should only change the datum if you are using a map or chart that specifi es a differ-
ent datum.
WARNING:
Selecting the wrong map datum can result in substantial position errors. When in
doubt, use the default WGS 84 datum for best overall performance.