Meridian Transit of the Sun Quiz Q

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Meridian Transit of the Sun
Quiz Q A
Junior Navigation Chapter 9
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1. If you are at Lo 150 00.0'W , your apparent
time and mean time will always be the same. a.
True b. False Why?
Mean time is determined by the position of the
mean sun, and apparent time is determined by the
position of the apparent sun
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2. Meridian transit of the sun occurred at ZT
1212 at Lo 47 00.0'W. What was the GHA of
the sun at ZT 1200?
GHA of sun _at_ ZT 1200 44 00.0' Recall that
GHA of the sun increases by 1 each 4 minutes of
time. At ZT 1200 it was 12 minutes prior to
meridian transit.
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3. You determine the Ho of the sun to be 37
24.8' at meridian transit, and determine the
declination of the sun at this time is 10
14.8'S. You are north of the sun. What is your
latitude?
Latitude 42 20.4'N Recall _at_ Meridian Transit,
Lat CoAlt Dec CoAlt 90 - 37 24.8'
52 35.2N (you are north of the sun) Lat
52 35.2N 10 14.8'S 42 20.4'N
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4. The observed altitude Ho, is subtracted from
90 to obtain Co-Altitude. a. True b. False
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5. Latitude is the sum of declination (N or S)
and Co-altitude. a. True b. False
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Meridian Transit of the Sun
End Of Quiz Q A
Junior Navigation Chapter 9