Nav 4 finale
Celestial Navigation Quiz
Test your knowledge on celestial navigation with our comprehensive quiz! This quiz consists of 30 thought-provoking questions designed for both beginners and seasoned navigators. Dive into the intricacies of celestial bodies, time measurement, and navigation techniques.
Challenge yourself and see how well you understand:
- Angular distances of celestial bodies
- Time measurements and their implications
- Geographical positioning based on celestial observations
- Understanding of twilight and solar time
Which term refers to the following 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
Which of the following LHA rate of change of 1 degree every 4 minutes us 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
5. Daylight is longer than the 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
PnP’s line
Which of the following can be considered as location of the body if the LHA is 360°?
Upper Transit
Lower Transit
Prime Vertical circle
PnP’s 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
Which of the following 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
. Which of the following conventional representation of the sky as a spherical shell on which the celestial bodies appear projected?
ACelestial 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. Find the latitude of the observer?
44°58’N
44° 58’S
28° 35’N
28°35’S
12. The navigator observed the planet, Venus, at 90° altitude , declination us 22° 37.6’ N. If the GHA is 208° 14.3’. Compute for the Longitude of the observer.
151°45.7 E
151° 54.7 E
151°46.0 E
151° 46.0 W
The navigator observed the planet, Venus, at 90° altitude , declination us 22° 37.6’ N. If the GHA is 208° 14.3’. Compute for 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 full Moon will always rise at about_____.
Sunrise
1200 LMT
Sunset
2400 LMT
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 moon
Which of the following whole number of hours that must be subtracted or added to zone time to obtain GMT is_______.
Zone Time
. Zone Description
GMT
LMT
Which of the following time based on the movement of the visible sun along the ecliptic, the time is known as _______.
Mean Time
. Visible Time
Apparent Time
Real Time
Which of the following time used by astronomers determined by the position of the first point of Aries in the celestial sphere is called_____.
Sidereal Time
Greenwich Time
Local Time
Apparent Time
Which of the following angle at the celestial pole contained between the anti meridian of the observer and the meridian of the mean sun, measured westward from the anti meridian of the observer and expressed in units of time is called_____
Locale Apparent Time
Local Mean Time
Greenwich apparent Time
Greenwich Mean Time
A local mean time of an observer on Greenwich meridian is called____.
Local Time
Greenwich Time
Apparent time
Universal Time
How are you going to find the Local meantime if you are on east longitude?
By adding LMT to ZD
By subtracting LMT to ZD
By adding GMT to longitude in time
By subtracting GMT to Longitude in time
Which of the following time do you call the mean solar time on the Greenwich meridian.
Local Time
Apparent Time
Universal Time
. Greenwich Time
Which of the following procedures can we measure solar time?
By using mean solar time
By using apparent mean sun
By using apparent solar time
By using Astronomical Mean Sun
How may hours is a solar day?
24 hours 00 minutes 00 seconds
23 hours 56 minutes 04 second
24 hours 50 minutes 00 seconds
23 hours 00 minutes 00 seconds
Which of the following angular distance between the prime vertical and the vertical circle of the body during sunrise and sunset is called______.
Azimuth Angle
Azimuth
Amplitude
Bearing
Which of the following time on the period between sunset and darkness in the evening and darkness and sunrise in the morning is called_____.
Civil Twilight
Nautical Twilight
Astronomical Twilight
Twilight
Which of the following constellation contains the pointer to locate the star Polaris ?
Cassiopeia
Orion
Ursa Minor
Ursa Major
He shaded rectangle in the Nautical Almanac means______.
Constant Daylight
Constant night
Twilight all day
Twilight all night
Which of the following symbol ‘////” is shown of time to indicate_____.
Twilight throughout the night
Twilight all day
Constant Daylight
Constant Night
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