Garmin GPSMAP 175 - Manual (Page 69)

• Local/UTC lets you choose to display the date and time in UTC
(Greenwich Mean Time) time or local time offset from UTC time. The
default setting is local with a ‘0’ offset. (If you are boating in the United
States, be sure to enter a negative time indicator in front of the
appropriate time offset for your location.)
• Tone Selection lets you select an audible tone to sound for either
messages and keystroke confirmation (the default setting), messages
only, or not to sound at all. (The tone selection does not affect the
external alarm operation.)
• Display Contrast provides a slide bar to adjust the LCD screen contrast
in order to compensate for changes in temperature or lighting conditions.
• Backlight Timeout provides an automatic shutoff for the GPSMAP
175’s screen backlighting. Six settings are available: No Timeout (the
backlight will stay on until it is turned off), 15 seconds (default
setting); 30 seconds; and 1, 2, or 4 minutes. Keeping the timeout at
the lowest acceptable setting will prolong the life of the backlight.
The system setup page also features an options page that allows you to
quickly reset all the system setup options to the factory default settings and
define speed, course and position values while in simulator mode (see Getting
Started Tour).
To view the system setup page options:
1. Press the O key.
To restore the default settings:
1. Highlight the ‘Restore Defaults?’ option, and press T.
SETUP MENUS
System Setup and System Setup Options
A. The tone preference
will not affect
external alarm
operation.
B. Keeping the
backlight timeout at
the lowest
acceptable setting
will prolong the
useful life of the
backlight.
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175 Manual 7/31/98 3:57 PM Page 65