Garmin 292 Guida Utente

M

AIN

 M

ENU

 > 

S

YSTM

 (S

YSTEM

) T

AB

The Unit tab defines the Position Format, Map Datum, Heading, 

Distance, Speed, Elevation, Depth, Temperature, and Pressure 

units. 

The following settings are available:

•   Position Format—changes the coordinate system. You 

should only change the position format if you are using a 

map or chart that specifies a different position format or want 

to use a format you are familiar with. 

For additional information on Loran TD setup, see 

page 104

  NOTE: The Units tab settings affects how navigation 

information appears on the GPSMAP 292/298. When in doubt, 

seek assistance. If you are using a map or chart in conjunction 

with your GPS, make sure the settings under the Units tab of 

the GPSMAP 292/298 match that of the map or chart. This 

information should appear somewhere on the map or chart. If 

the information is not present, contact the map or chart maker 

to determine what position format, datum, heading and units of 

measure are being used for the map or chart.

•   Map Datum—sets the datum reference used to determine 

a given location. The default setting is WGS 84. The 

unit automatically chooses the best datum depending on 

your chosen position format. Datums are used to describe 

geographic locations for surveying, mapping, and navigation.  

You should only change the datum if you are using a map or 

chart that specifies a different datum. 

  WARNING: Selecting the wrong map datum can result in 

substantial position errors. Unless otherwise specified by 

the navigation documentation you are using, use the default 

WGS 84 datum for best overall performance.