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Prog 1 Flashcards

1
Q

Perihelion

A

Closest to sun
Early January

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2
Q

Aphelion

A

Furthest from sun
Early July

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3
Q

Nautical mile breakdown

A

6076 ft
1852 m
1.15 statute miles

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4
Q

Statute mile

A

5280 ft

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5
Q

Kilometre

A

3280 ft
1000 m

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6
Q

Departure distance equation

A

Chlong x 60 x cos(latitude)

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7
Q

Variation

A

Magnetic to true
East (+) magnetic less than true
West (-) magnetic is more than true

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8
Q

Isogonals

A

Lines joining places with equal variation

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9
Q

Agonal

A

Lines joining places with 0 variation

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10
Q

Deviation

A

Difference in compass and magnetic (run DMC)
East compass less than magnetic
West compass more than magnetic

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11
Q

Relative bearing

A

Based on axis of aircraft

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12
Q

Equinox

A

Sun over equator
March and September

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13
Q

Solstice

A

Sun over tropics
December 21 June 21

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14
Q

Hour and minute in degrees

A

1 hour 15°
4 minutes 1°

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15
Q

LMT

A

Transit of sun over observer
0000 when sun over anti meridian of observer

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16
Q

GMT

A

Same as UTC
Z
East of gmt lmt is ahead
West of gmt lmt is behind

17
Q

Zone time

A

15° sections best off gmt
Calculated based on hours added from lmt to utc
A-M east
N-Y west

18
Q

Nzdt

A

UTC +13
Last Sunday in September —> first sun April

19
Q

Sensible horizon

A

34’ below visual horizon
Same as celestial

20
Q

Declination at equinox and solstice

A

0° at equinox
23.5° solstice

21
Q

Increasing vs decreasing declination

A

Movement in relation to equator/latitude
Increasing going away from equator

22
Q

Civil twilight

A

Centre of sun 6° below horizon

23
Q

Nautical twilight

A

6-12 below horizon

24
Q

Astronomical twilight

A

12-18 below horizon

25
Q

Earths rotation around sun viewed from North Pole

A

Anticlockwise and and elliptical

26
Q

Difference between equinoctial and ecliptic

A

23.5°

27
Q

Sidereal day

A

Based on observation of celestial body
Shorter than solar day

28
Q

Maximum difference between mean noon and real/apparent noon

A

November and February

29
Q

Maximum difference between mean and apparent time

A

16 minutes

30
Q

Length of sidereal year

A

365 days 6hours

31
Q

Leap year

A

Every 4 years except centuries not divisible by 4

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