Garmin GPSCOM 190 - Manual (Page 70)

The next setup menu listing is Position/Datum. The
default position setting is latitude and longitude in
degrees and minutes (hddd^mm.mmm’). You may also
select degrees, minutes and seconds (hddd^mm'ss.s’);
degrees only (hddd.ddddd"), UTM/UPS coordinates; or
Swiss, Swedish, Irish, German,or British Grid formats.
Position/Datum
To select a position format:
1. Highlight the 'Posn Format' field and press
2. Select a format and press
Map Datum Setting
The map datum is located just below the heading
field, and comes with a WGS 84 default setting.
Although 106 map datums are available for use (see the
map datum list in Appendix D), you should only change
the datum if you are using charts that specify a different
datum than WGS 84.
To select a map datum:
1. Highlight the 'Map datum' field and press
2. Use the arrow keypad to toggle through and select the
desired setting. Confirm the setting by pressing ■
Audio/Display Options
The Audio/Display options allows the user to deter­
mine the display contrast of the display screen and adjust
the backlight timer. The next submenu is the backlight
timer. From the timer, you have six different adjustable
settings to choose from; 0, 15, 30, 60, 120 and 240 sec­
onds. The submenu tones at the bottom of page allow
you to select from three settings; MSG only, MSG and
Keystroke, and None. The setting will keep the screen
backlighting on as long as the unit is on.
To set the backlight timer;
1. Highlight the 'Backlight Time' field and press
2. Toggle through and select the desired setting. Confirm
the setting by pressing i
3. To turn backlighting on and off through three levels of
lighting, press the backlight button.
R f i F E R E N C E
Main Memi
Opiions iy
SetfiHgs
POSITION
Posn Formcit:
hddd^mm. mmm'
Map Datum:
ISGS 3^
126.77 119.00
WARNING; Using tlie
vvrang map datum can scri-
otisb ajject the accuracy of
your GPSCOM 190.
nUDIQ/DISPLflV
Contrast:
Backlight Time:
15 seconds
Tones:
Msg £ Key
126.77 119.00
Contrast, backlight timer,
and tone may he controlled
from the audio/display
page.