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Appendix E
Time Offset
Time Zones and UTC Time Offset
The StreetPilot III has many time zones built into memory. To display the correct local time,
simply choose the corresponding time zone. Internally, the StreetPilot III does the necessary “offset”
calculations to convert from UTC (Coordinated Universal Time) to selected local time zone.
To select a time zone:
1. Press MENU twice to select the Main Menu, then use the ROCKER KEYPAD to select “System
Setup” and press ENTER.
2. Use the ROCKER KEYPAD to select the ‘Time’ fi le tab, then use the ROCKER KEYPAD to select
the ‘Time Zone’ fi eld.
3. Press ENTER to display a list of available time zones. Then use the ROCKER KEYPAD to select the
desired time zone and press ENTER.
If the desired time zone is not pre-programmed into the StreetPilot III, you’ll need to enter the
time offset manually. To do this, select ‘Other’ as the time zone. Once selected, a ‘UTC Offset’ fi eld
appears directly adjacent to ‘Other’, allowing you to manually enter the difference between UTC and
the local time zone.
To manually enter a time zone offset:
1. Follow the steps above and select ‘Other’ in the ‘Time Zone’ fi eld.
2. Use the ROCKER KEYPAD to select the ‘UTC Offset’ fi eld, press ENTER, then use the ROCKER
KEYPAD to enter the desired offset amount.
3. Press ENTER when fi nished.
If you are not certain what the offset is between UTC and the local time zone, experiment. Simply
enter incremental offset values until the correct local time appears. To aid this endeavor, keep in mind
that as you move West of the Prime Meridian (0° longitude) the offset will be negative (-), and as you
move East of the Prime Meridian the offset will be positive (+). In other words, it will be earlier in the
day when you move West and later in the day when you move East.
Many time zones are pre-programmed into your
StreetPilot III making display of local time simple.
If the desired time zone is not pre-programmed, select
‘Other’ and enter the offset from UTC to the local time.
190-00256-10_0B.indd 59 1/13/2003, 10:34:26 AM