Garmin GPSMAP 175 - Manual (Page 70)

A. The GPSMAP 175
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.
SETUP MENUS
Navigation Setup
The navigation setup submenu is used to select a variety of navigation
information 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)
• hdddºmm’ss.s” (deg/min/sec) • British grid
• German grid
• Irish grid
• Maidenhead • Swedish grid
• Swiss grid • Taiwan grid
• UTM/UPS grid
• 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 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.
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175 Manual 7/31/98 3:57 PM Page 66