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Navigation Setup
The navigation setup submenu is used to select a variety of navigation informa-
tion including: position format, units of measure, and heading preferences. This
submenu is also used to select map datums, set the CDI scale and adjust the built-
in velocity filter. The following options are available:
Position Format lets you select the coordinate system used to display
position. The following formats are available:
hddd.dddddº (degrees) hdddºmm.mmm (degrees and minutes)
hdddºmmss.s (deg/min/sec) British grid
German grid Irish grid
Maidenhead Swedish grid
Swiss grid Taiwan grid
Loran TD UTM/UPS grid
See Appendix G, page 80 for more information on the Loran TD positon format.
Navigation Units selects the format for speed and distance measurements. You may
select from nautical, statute, or metric formats. (The default setting is nautical.)
Depth Units selects the format for depth contour display on Micro G-chart offshore
chart cartridges. Depth contours can be displayed in feet, meters, or fathoms. (The
default setting is feet.)
Heading lets you select what reference is used in calculating heading information.
You can select to reference automatic magnetic variation, true north, grid heading,
or user magnetic variation. (The default setting is automatic.)
To enter a user magnetic variation:
1. Highlight the Heading field and press
T
. Select the User Mag Var
option and press
T
.
2. Press
T
to access the variation field, and use the
R
keypad to
enter the desired variation. Press
T
to confirm.
CDI Scale provides a list of six CDI scale settings for the map page CDI: +/-0.10,
0.50, 1.0 (default), 5.0, 10.0, and 25.0 miles or kilometers. The scale represents
the distance from the center of the scale to either end of the scale.
60
A. The GPSMAP 180 will also display position
coordinates in eight grid formats.
B. To enter a user magnetic variation, select the
User Mag Var option and enter a direction
and value in the variation field.
SECTION
9
SETUP MENUS
Navigation Setup