Appendix h – Garmin GPS III Plus User Manual

Page 107

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APPENDIX H

Time Offsets

Longitudinal Zone

Offset

W180.0º to W172.5º

-12

W172.5º to W157.5º

-11

W157.5º to W142.5º

-10

W142.5º to W127.5º

-9

W127.5º to W112.5º

-8

W112.5º to W097.5º

-7

W097.5º to W082.5º

-6

W082.5º to W067.5º

-5

W067.5º to W052.5º

-4

W052.5º to W037.5º

-3

W037.5º to W022.5º

-2

W022.5º to W007.5º

-1

W007.5º to E007.5º

0

Longitudinal Zone

Offset

E007.5º to E022.5º

+1

E022.5º to E037.5º

+2

E037.5º to E052.5º

+3

E052.5º to E067.5º

+4

E067.5º to E082.5º

+5

E082.5º to E097.5º

+6

E097.5º to E112.5º

+7

E112.5º to E127.5º

+8

E127.5º to E142.5º

+9

E142.5º to E157.5º

+10

E157.5º to E172.5º

+11

E172.5º to E180.0º

+12

A simple way to determine your local
time offset is how many hours you are
behind or ahead of UTC (also called
‘Greenwich’ or ‘zulu’ time).
Example: EST (Eastern Standard
Time) is 5 hours behind UTC, so your
offset would be -5. Adding one hour
for daylight savings would make EDT
(Eastern Daylight Time) - 4. Subtract
an hour for each time zone as you
travel west.
Offsets for Continental U.S. would be:
EST -5 EDT -4
CST -6 CDT -5
MST -7 MDT -6
PST -8 PDT -7

The chart below gives an approximate UTC (Universal Time Coordinate) time offset for the

various longitudinal zones. Check with local charts for more detailed information. If you are in
daylight savings time, add one hour to the offset.

H

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