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Garmin GPSMAP 238 Sounder User Manual

Page 120

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110

Time Offsets

Appendix H

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.

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

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

+

Longitudinal

Zone

Offset

188188C238 Manual Part 2.indd 110

6/30/2003, 3:32:50 PM