Timezones: Difference between revisions
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| Line 25: | Line 25: | ||
! Time of TZ Change | ! Time of TZ Change | ||
! Offset from GMT | ! Offset from GMT | ||
|- | |||
| Baker | |||
| | |||
| 11 | |||
|- | |||
| Honolulu | |||
| | |||
| 10.5 | |||
|- | |- | ||
| Howland | | Howland | ||
| Line 34: | Line 42: | ||
| 10.5 | | 10.5 | ||
|- | |- | ||
| | | Lae | ||
| | | | ||
| 10 | | (-10) | ||
|- | |- | ||
| San Francisco | | San Francisco | ||
| Line 52: | Line 56: | ||
| London | | London | ||
| | | | ||
| -1 | | (-1) | ||
|- | |- | ||
| American Samoa | | American Samoa | ||
| Line 127: | Line 131: | ||
|- | |- | ||
| 20 June 1100 | | 20 June 1100 | ||
| -12 | | (-12) | ||
|- | |- | ||
| 22 June 1800 | | 22 June 1800 | ||
| -11 | | (-11) | ||
|- | |- | ||
| 5 July 0800 | | 5 July 0800 | ||
| Line 158: | Line 162: | ||
|- | |- | ||
| 15 July 0000 | | 15 July 0000 | ||
| -12 | | (-12) | ||
|- | |- | ||
|rowspan="4"| ''Colorado'' | |rowspan="4"| ''Colorado'' | ||
Revision as of 17:03, 16 December 2011
The basic information for this table is found in Randy Jacobson's work, "Time Zones for Earhart Radio Message Database."
- From local to GMT
- To determine how to get back to GMT time from a local time, always add the offsets given below to get GMT time.
- From GMT to local
- Subtract the value of the offset from GMT to get the local time.
- Math reminders
- When we add negative numbers, the result is the same as subtracting the absolute value of the number from the base.
- 0000 GMT + (-1) = 0000 - 0100 = 2300
- When we subtract negative numbers, the result is the same as adding the absolute value of the number to the base.
- 0000 GMT - (-1) = 0000 + 0100 = 0100
| Ship/Place | Time of TZ Change | Offset from GMT |
|---|---|---|
| Baker | 11 | |
| Honolulu | 10.5 | |
| Howland | 10.5 | |
| Jarvis | 10.5 | |
| Lae | (-10) | |
| San Francisco | 8 | |
| Washington, DC | 5 | |
| London | (-1) | |
| American Samoa | 11 | |
| CINCUS | 8 | |
| COMINBATFOR | 10.5 | |
| COMDESCOFOR | 8 | |
| COMAIRBASEFOR | 8 | |
| COMBATSHIPS | 8 | |
| COMAIRBATFOR | 8 | |
| Duane | 13 Jan 1937 | 10.5 |
| 15 Jan 0530 | 11 | |
| 24 Jan 1300 | 10.5 | |
| Shoshone | March 10, 0700 | 10.5 (stays 10.5 for duration of first attempt) |
| Itasca | 19 June 0000 | 10.5 |
| 20 June 1400 | 11 | |
| 22 June 1400 | 11.5 | |
| 12 July 1400 | 12 | |
| 14 July 0000 | 11.5 | |
| 20 July 1400 | 11 | |
| 23 July 0800 | 10.5 | |
| Ontario | 17 June 1937 | 0700 11 |
| 18 June 0000 | 12 | |
| 20 June 1100 | (-12) | |
| 22 June 1800 | (-11) | |
| 5 July 0800 | -12 | |
| 7 July 1500 | 12 | |
| 9 July 1500 | 11 | |
| Swan | 1 July 0000 | 11 |
| 6 July 1300 | 11.5 | |
| 10 July 0300 | 11 | |
| 10 July 1700 | 11.5 | |
| 12 July 1900 | 12 | |
| 15 July 0000 | (-12) | |
| Colorado | 3 July 1400 | 10.5 |
| 4 July 4 1300 | 11 | |
| 7 July 1300 | 11.5 | |
| 14 July 1300 | 10.5 | |
|
Lexington |
1 July 1937 | 8 |
| 5 July 1600 | 9 | |
| 7 July 1600 | 10 | |
| 8 July 1030: | 10.5 | |
| 12 July | 11.5 | |
| 21 July | 10.5 |