ATPL - General Navigation BASICS OF
NAVIGATION The Solar System- INS
operation
The Solar System
1. What is the highest latitude listed below at which the sun will reach an altitude
of 90o above the horizon at some time during the year?
A – 0o
B – 45o
C – 66o
D – 23o
Ref: AIR: atpl, cpl; HELI: atpl, cpl
Ans: D
2. Assuming mid-latitudes (40o to 50o N/S). At which time of year is the
relationship between the length of day and night, as well as the rate of change
of declination of the sun, changing at the greatest rate?
A – Summer solstice and spring equinox
B – Spring equinox and autumn equinox
C – Summer solstice and winter solstice
D – Winter solstice and autumn equinox
Ref: AIR: atpl, cpl; HELI: atpl, cpl
Ans: B
3. What is the approximate date of perihelion, when the Earth is nearest to the
Sun?
A – Beginning of January
B – End of December
C – Beginning of July
D – End of March
Ref: AIR: atpl, cpl; HELI: atpl, cpl
Ans: A
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NAVIGATION The Solar System- INS
operation
The Solar System
1. What is the highest latitude listed below at which the sun will reach an altitude
of 90o above the horizon at some time during the year?
A – 0o
B – 45o
C – 66o
D – 23o
Ref: AIR: atpl, cpl; HELI: atpl, cpl
Ans: D
2. Assuming mid-latitudes (40o to 50o N/S). At which time of year is the
relationship between the length of day and night, as well as the rate of change
of declination of the sun, changing at the greatest rate?
A – Summer solstice and spring equinox
B – Spring equinox and autumn equinox
C – Summer solstice and winter solstice
D – Winter solstice and autumn equinox
Ref: AIR: atpl, cpl; HELI: atpl, cpl
Ans: B
3. What is the approximate date of perihelion, when the Earth is nearest to the
Sun?
A – Beginning of January
B – End of December
C – Beginning of July
D – End of March
Ref: AIR: atpl, cpl; HELI: atpl, cpl
Ans: A
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,
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