Chapter 7.4 - Time and Time Systems Flashcards
List all Date/Time systems used in Aviation?
- 10 digit.
- 8 digit.
- 6 digit.
- 4 digit.
What calculation do you use when adding Time that exceeds 60 minutes (2)?
- Add the numbers together.
- +1 hour and -60 from the minutes figure.
What calculation do you use when adding Time that exceeds 24 hours (2)?
- Add the numbers together.
- +1 day and -24 from the hour figure.
What calculation do you use when subtracting Time in minutes that is higher than first figure (2)?
- -1 hour and +60 minutes to first figure.
- Subtract the second figure from step one.
What calculation do you use when subtracting Time in hours that is higher than first figure (3)?
- -1 hour and +60 minutes to first figure.
- -1 day and +24 hours to step one.
- Subtract second figure from step two.
360° in Longitude is equal to how much in mean time?
24 hours.
15° in Longitude is equal to how much in mean time?
1 hour.
1° in Longitude is equal to how much in mean time?
4 minutes.
15’ in Longitude is equal to how much in mean time?
1 minute.
1’ in Longitude is equal to how much in mean time?
4 seconds.
What does LMT stand for?
Local Mean Time.
What does UTC stand for?
Coordinated Universal Time.
For LMT, when Longitude is East, what happens to UTC?
Decreases.
For LMT, when Longitude is West, what happens to UTC?
Increases.
What does ZT stand for?
Zone Time.
What does SM and ST stand for?
- Standard Meridian.
- Standard Time.
What does EST stand for and its meridian (2)?
- Eastern Standard Time.
- LMT = 150°E.
What does CST stand for and its meridian (2)?
- Central Standard Time.
- LMT = 142°30’E.
What does WST stand for and its meridian (2)?
- Western Standard Time.
- LMT = 120°E.
How many hours difference between UTC and EST?
+1000 h.
How many hours difference between UTC and CST?
+0930 h.
How many hours difference between UTC and WST?
+0800 h.
Summer Time between (October to March) moves the base meridian by how many degrees and to which direction?
- 15°.
- East.
How many hours are added to the correction between UTC and Australia’s time zones during Summer Time?
+1 h.
What does ESST, CSST and WSST stand for (3)?
- Eastern Standard Summer Time.
- Central Standard Summer Time.
- Western Standard Summer Time.
What two factors affect the amount of Daylight?
- Date/Season.
- Latitude.
What two factors affect the time of sunrise and sunset?
- Date/Season.
- Latitude.
True or False. Longitude can also affect sunrise and sunset?
True.
What does BoD stand for?
Beginning of Daylight.
What does EoD stand for?
End of Daylight.
What is the name given to the period between sunrise/sunset to the beginning/end of daylight and their abbreviations?
- Morning Civil Twilight (MCT).
- Evening Civil Twilight (ECT).
What is the degree below the observer during MCT and ECT?
6°.
It is a VFR requirement to arrive at a destination at least ‘x’ minutes before EoD. What is x?
10 minutes.
The date (by month and day) is plotted at the top and bottom of the graph. Each small square represents what time length?
5 days.
The Daylight is plotted either side of the graph. Each small square represents what time length?
5 minutes.
Name three other factors which can affect Daylight?
- Clouds.
- Visibility Restriction.
- Local Terrain
