Garmin GPS Receiver GPSMAP User Manual

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• Time Offset provides a data entry field to enter the time difference between UTC
time and the local time. (See Appendix F for a list of time offsets.) When entering a
time offset, be sure to select a positive or negative offset. Note that entering an off-
set will not automatically display local time. The local setting from the Date/Time
Selection submenu must be selected.
• 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 indi-
cator 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.
Note: Setting the tone selection for no sound will prevent an audible tone for all
alarms, including shallow water and proximity waypoints.
• 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 135 Sounder’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).
74
SECTION
10
SETUP MENUS
System Setup & System
Setup Options
B
A. The ‘None’ tone setting will prevent an audible
tone from sounding for any key presses, messages,
or alarms. Regardless of the tone setting,
‘MESSAGE -PRESS PAGE’ will continue to be
flashed on the status bar for any system messages
or alarms.
B. Keeping the backlight timeout at the lowest
acceptable setting will prolong the useful life of the
backlight.
GPS 135 Rev C 8/4/98 4:19 PM Page 74

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