15 - Time & Navigation Flashcards
1
Q
International Date Line
A
- 180º
- Sun travels East to West
- M and Y timezones are 7.5º wide
2
Q
Prime Meridian
A
- Longitude 000º
- “Z” - Reference for all other timezones
- Timezones East of Prime Meridian (A-M)
- All negative, with A = -1
- No “J” - used to refer to local time
- Add an hour for each timezone
- Timezones West of Prime Meridian (N-Y)
- All positive, with N = +1
- Subtract an hour for each timezone
3
Q
Info about Timezones
A
If it’s SUNday in San Diego, it’s MONday in Manila
- At timezones M and Y, add or subtract A DAY
- 1º = 4 min
- 1’ = 4 sec
4
Q
Date Time Group Format (DTG)
A
DDTTTTZMONYR
2030 GMT on the 26th of February 2018 in DTG format is:
262030ZFEB18
5
Q
Arc to Time Conversion
A
Time that it takes the sun to apparently traverse along a longitudinal distance
6
Q
Timezones East of Prime Meridian
A
7
Q
Timezones West of Prime Meridian
A
