Dave
Navigating the Stars: A Celestial Navigation Quiz
Test your knowledge of celestial navigation with this comprehensive quiz designed for enthusiasts and learners alike. With 40 engaging questions, you'll explore key concepts related to the Nautical Almanac, the properties of celestial bodies, and the intricacies of navigation.
- 40 carefully crafted multiple-choice questions
- Perfect for students, teachers, and navigation enthusiasts
- Enhance your understanding of astronomy and navigation techniques
Which is used to find the GHA and declination of the sun at the time of observation in the nautical almanac? T4 LO2.4 R
GMT
UTC
LMT
LZT
The time of the sun’s meridian passage listed in the nautical almanac is in ______.
GMT
LMT
UTC
LZT
Which is used as the entering argument in the nautical almanac’s altitude correction table?
Sextant altitude
Apparent altitude
Observed altitude
Observed altitude
The angular distance between the prime vertical and the vertical circle of the body during sunrise and sunset is called
Azimuth angle
Azimuth
Amplitude
Bearing
The sun will rise at 0600H and set at 1800H when the observer is at what latitude?
Latitude 0-degree
Latitude 10 degrees
Latitude 45 degrees
Latitude 60 degrees
The difference between the local apparent time (L.A.T.) and local mean time (L.M.T.
Mean time
Greenwich time
Sidereal time
Equation of time
The time reckoned by the motion of the mean sun with respect to the specified geographical location.
Mean time
Greenwich time
Sidereal time
Equation of time
Time system used internationally and is based upon atomic time.
Equation of time
Mean time
Coordinated universal time
Siderial time
The time used by astronomers and is determined by the position of the first of Aries in the celestial sphere.
Siderial time
Mean
Equation of time
Greenwich time
The local time of an observer on Greenwich meridian.
Equation of time
Mean time
Greenwich time
Siderial time
Which is/are true regarding Polaris as a circumpolar body? I. It does NOT set II. It can be seen anywhere on earth
I only
II only
Either I or II
Neither I nor II
What is the reason why Polaris is NOT a permanent north star?
Tilt of the earth’s axis
Precession of the equinoxes
Constantly changing declination of the sun
Obliquity of the earth’s revolution around the sun
What information is needed to extract the three correction factors in the Polaris tables?
GHA Aries, latitude, and month
GHA Aries, latitude, and longitude
LHA Aries, latitude, and month
LHA Aries, latitude,and longitude
A celestial body with an azimuth of 270°will give LOP that determines your _____.
Longitude
Latitude
Polar distance
Zenith distance
When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine _____
Sunrise
Local mean time
Time of local apparent noon
Zone time
The shaded rectangle in the Nautical Almanac means _____.
Constant daylight
Constant night
Twilight all day
Twilight all night
Symbol ’////’ is shown in place of time to indicate _____.
Twilight throughout the night
Twilight all day
Constant daylight
Constant night
Which of the following is true in getting sunrise/sunset using nautical almanac?
Using given latitude, interpolation, ZD
Using given latitude, Longitude in time, ZD
Using higher and lower latitude, Longitude in time, ZD
Using higher and lower latitude, Interpolation, Longitude in time
How many days do Moonrise and moonset have on a page of the nautical almanac
3
4
5
6
How can you find the LHA of a star using a nautical almanac?
Getting GHA and Inc of Star + Longitude
Getting GHA and Inc of Star + Longitude
Getting GHA and Inc of Aries + SHA of Star + East Longitude
Getting GHA and Inc of Aries + SHA of Star + West Longitude
Which term refers to the angular distance of a Celestial body North or South of Equinoctial?
Zenith distance
Polar Distance
Declination
Celestial Equator
Time Diagram is a diagram on the plane of the _____.
Celestial horizon
Celestial equator
Celestial meridian
Prime meridian
LHA’s rate of change of 1 degree every 4 minutes is mainly caused by _____.
The revolution of the earth around the sun
Maximum declination of 23.5 degrees
Change of altitude of the body
The rotation of the earth on its axis
How do you calculate the Geographical Position of a celestial body if the GMT is known?
By the body’s declination and GHA
By the body’s declination and SHA
By the body’s zenith distance and GHA
By the body’s zenith distance and SHA
Daylight is longer than darkness when _____.
Latitude and declination have the same name
Declination is at its maximum
Altitude is equal to zero
The altitude of the observer is zero
Where is the body if the LHA is 180°?
Upper Transit
Lower transit
Prime vertical circle
PnPs line
Where is the body if LHA is 360°?
Upper Transit
Lower transit
Prime vertical circle
PnPs line
The two opposite points of the celestial sphere where it is pierced by the earth’s axis is called ____.
Celestial Pole
Right Ascension
Celestial Equator
Celestial Meridian
What is the arc of the equinoctial system of coordinates that is contained between the hour circle of Aries measured westward to the hour circle of the body?
Right Ascension
Local Hour Angle
Greenwich Hour Angle
Sidereal Hour Angle
What is known as the angular distance of a celestial body N or S of the celestial equator measured along the hour circle of the body?
Altitude
Zenith distance
Polar distance
Declination
What is the conventional representation of the sky as a spherical shell on which the celestial bodies appear projected?
Celestial Equator
Celestial Horizon
Celestial Sphere
Celestial Meridian
The sun’s true altitude at meridian passage was 61° 25’S, the sun declination is 16° 23’N. What is the latitude of the observer?
44° 58’N
44° 58’S
28° 35’N
28° 35’S
The navigator observed the planet, Venus, at 90° altitude, declination is 22° 37.6’ N, and the GHA is 208° 14.3’. Compute the longitude of the observer.
151° 45.7 E
151° 54.7 E
151° 46.0 E
151° 46.0 W
In low latitudes, the full Moon will always rise at about _____.
Sunrise
1200 LMT
Sunset
2400 LMT
The navigator observed the planet, Venus, at 90° altitude, declination is 22° 37.6’ N and the GHA is 208° 14.3’. Compute the latitude of the observer.
22° 37.8’N
22° 37.6’N
67° 22.4’N
67° 22.8’N
In low latitudes, the new Moon will always rise at about _____.
Sunrise
1200 LMT
Sunset
2400 LMT
The difference between local apparent time and local mean time is indicated by the _____.
Zone description
Equation of time
Longitude in time
Local apparent noon
When the time is based on the movement of the visible sun along the ecliptic, the time is known as _____.
Mean time
Visible time
Apparent time
Real-time
The whole number of hours that must be subtracted or added to zone time to obtain GMT is _____.
Zone time
Zone Description
GMT
LMT
The time used by astronomers and is determined by the position of the first point of Aries in the celestial sphere is called _____.
Sidereal time
Greenwich time
Local time
Apparent time
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