NAV4 Reviewer w/o solving - Jen
NAV4 Celestial Navigation Quiz
Test your knowledge of celestial navigation with our challenging NAV4 Reviewer quiz. Designed to enhance your understanding of astronomical concepts and techniques, this quiz covers key terms, calculations, and principles essential for any aspiring navigator.
- Multiple choice questions
- Explore various celestial concepts
- Perfect for learners and professionals alike
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 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 rotate 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
Which of the following can be considered as location of 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
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?
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 its longitude.
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 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 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 noon
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 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
Which of the following time used by astronomers and is determined by the position of the first point of Aries in the celestial shpere 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 westard from anti meridian of the observer and expressed units of time is called _____.
Local Apparent Time
Local Mean Time
Greenwich Apparent Time
Greenwich Mean Time
A local time of an observer on Greenwich meridian is called _____.
Local Time
Greenwich Time
Apparent Time
Universal Time
How are you going to find Local mean time 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 Logitude in time
Which of the following time do you call the mean solar time on Greenwich meridian?
Local Time
Apparent Time
Universal Time
Greenwich Time
Which of the following procedure 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 many hours is a solar day?
24 hours 00 minutes 00 seconds
23 hours 56 minutes 04 seconds
24 hours 50 minutes 00 seconds
23 hours 00 minutes 00 seconds
Which of the following angular distance between 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 constellation contains the pointer stars to locate the star Polaris?
Cassiopeia
Orion
Ursa minor
Ursa major
The shaded rectangle in the Nautical Almanac means _____.
Constant daylight
Constant night
Twilight all day
Twilight all night
Which of the symbol ’////’ is shown in place of time to indicate _____.
Twilight throughout the night
Twilight all day
Constant daylight
Constant night
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