NAV4: Part 2
NAV4: Celestial Navigation Quiz
Test your knowledge of celestial navigation concepts with our NAV4: Part 2 quiz. This interactive experience is designed for enthusiasts and students to assess their understanding of important topics such as lunar phases, solar time, and local mean time.
Key Features:
- Multiple-choice questions
- Immediate feedback on answers
- Educational and fun!
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
In low latitudes, a first quarter Moon will always rise at about _____.
Sunrise
1200 LMT
Sunset
2400 LMT
Which planet is NOT used in celestial navigation?
Mercury
Venus
Jupiter
Saturn
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
Apparent time is based on _____.
The fictitious sun moving along the celestial equator
The movementof the First Point of Aries
The moon motion in relation to the sun
The visible sun moving along the ecliptic
When 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
A mean solar time measured with reference to a given local meridian is known as _____.
GMT
LMT
Zone time
Longitude in time
The measurement of the Local Mean Time is based on the passage of the sun over the _____.
Lower branch of observer's meridian
Upper branch of observer’s meridian
Upper branch of Greenwich meridian
Lower branch of Greenwich meridian
The LMT of meridian passage in the Nautical Almanac is 1214H. Longitude at meridian passage is 45 deg. 45’ E. What is LZT meridian passage?
1211H
1214H
1210H
1212H
When the time is based on the movement of the visible sun along the ecliptic, the time is known as _____.
Visible time
Mean time
Apparent time
Real time
The measurement of Local Mean Time is based on the passage of the sun over the _____.
Lower branch of Greenwich meridian
Upper branch of Greenwich meridian
Upper branch of observer’s meridian
Lower branch of observer’s meridian
The LMT of meridian passage in the Nautical Almanac is 1214H. Longitude at meridian passage is 45°45’E. What is LZT meridian passage?
1211H
1214H
1210H
1212H
The time used by astronomes 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
Time reckoned by the motion of the mean sun with respect to the specified geographical location is called _____.
Civil time
Mean time
Zone time
Apparent time
The 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
What do you call the mean solar time on Greenwich meridian?
Local Time
Apparent Time
Universal Time
Greenwich Time
How 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
What time is reckoned with the motion of the mean sun with respect to the specified geographical location?
Civil Time
Zone Time
Mean Time
Apparent Time
When the equation of time is taken from the Nautical Almanc for use is celestial navigation, it is used to determine _____.
Sunrise
Local mean time
Time of local apparent noon
Zone time
Approxiamately how much shorter is a sideral day than a solar day?
16 min
4 min
8 min
12 min
The sidereal day begins when the _____.
1st point of Aries is over the upper branch of the reference meridian
Sun is over the lower branch of the reference meridian
Sun is over the upper branch of the reference meridian
1st point of Aries is over the lower branch of the reference meridian
The sidereal day begins when the _____. What is the time measured on the celstial equator from Lower branch of the observer’s meridian westward to hour circle through the sun from 0000H to 2400H?
Zone tile
Local mean time
Sidereal time
Local apparent time
_____ is a time system used internationally and is based upon atomic time.
GREENWICH LOCAL TIME
COORDINATE UNIVERSAL TIME
INTERNATIONAL DATE LINE
LOCAL MEAN TIME
_____ is the angle at the celestial pole contained between the anti meridian of the observer and the meridian of the mean sun, measured westward from anti meridian of the observer and expressed units if time.
COORDINATE UNIVERSAL TIME
GREENWICH LOCAL TIME
LOCAL MEAN TIME
EQUATORIAL TIME
_____ is a local time of an observer on Greenwich meridian.
Universal Time
Greenwich Time
Local Mean Time
Equatorial Time
_____ is the difference between the local apparent time (L.A.T.) and local mean time (L.M.T.).
Local time
Universal time
Equatorial time
Greenwich time
______ is the time used by astronomers and is determined by the position of the first point of Aries in the celestial sphere.
Sidereal time
Mean time
Universal time
Local time
Time and equation of time (5 points)Given: Latitude= 30°N, Longitude= 158°E, ZD= -10 (ship’s) If the LMT of the sun’s meridian passage in the nautical almanac is 1150H compute for the LZT
1118H
1119H
1123H
1124H
Which are the four navigational planets, arranged according to their or stellar magnitude?
Venus, Jupiter Saturn and Mars
Mars, Venus, Saturn and Jupiter
Venus, Jupiter, Mars and Saturn
Saturn, Mars, Jupiter and Venus
Which are the inferior planets?
Mars and Venus
Mercury, Venus and Mars
Mars and Mercury
Mercury and Venus
What is the maximum declination of sun?
23 ° 25.3
23 ° 26.3
23 ° 27.3
23 ° 28.3
What is the maximum declination of sun?
Precession of the equinoxes
Daily rotation of Earth on its axis
Revolution of the earth about the sun
Inclination of the earth’s axis to the plane of revolution
The point on the ecliptic system occupied by the sun at maximum declination south is called the _____.
Vernal equinox
Winter solstice
Summer solstice
Autumnal equinox
Polaris is part of what constellation?
Orion
Ursa Minor
Ursa Major
Cassiopeia
Which constellation contains the pointer stars to locate the star Polaris?
Cassiopeia
Orion
Ursa minor
Ursa major
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’s are 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
In the lower right hand column of the daily pages of the Almanac, the time of Meridian Passage is given in _____.
GMT
LMT
LAN
LZT
Symbol ’////’ is shown in place of time to indicate _____.
Twilight troughout the night
Twilight all day
Constant daylight
Constant night
The unshaded rectangle in the Nautical Almanac means _____.
Constant daylight
Constant night
Twilight all day
Twilight all night
In the lower right hand column of the daily pages of Almanac, the time of Meridian Passage is given in _____.
GMT
LMT
LAN
LZT
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 does Moonrise and moonset have in a page of nautical almanac?
3
4
5
6
How can you find LHA of star using 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
_____ is a navigator should measure first of the height of the eye and use the table of corrections or formula.
Dip
Index error
Refraction
Parallax
What is the correction applied to the visible horizon to obtain sensible horizon?
Index error
Dip
Refraction
Parallax
How many navigational stars are listed in the nautical almanac?
55
57
54
53
Time of sunrise and sunset in the nautical almanac is in _____.
GMT
UTC
LMT
LZT
Which is used to find the GHA and declination of the sun at the time of observation in the nautical almanac?
GMT
UTC
LMT
LZT
The time of the sun’s meridian passage listed in the nautical almanac is in ______.
GMT
UTC
LMT
LZT
Which is used as the entering argument in the nautical almanac’s altitude correction table?
Sextant altitude
Apparent altitude
Observed altitude
Corrected altitude
The angular distance between 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 60 degrees
Latitude 45 degrees
When the observer is at the equator, the sun’s declination in 12°N. What is the azimuth of the sun at rising?
078°
088°
090°
100°
In latitude 28°S, the sun’s declination is 0°, what will be the approximate azimuth on rising?
062°
076°
090°
118°
Error of compass by amplitude (10 points)The setting sun bore 292° pgc, if the observer's latitude is 10°N and the sun's declination is 20°N.Compute for the gyro error by amplitude.
G/E = 1.9° W, T=280.3°
G/E = 1.3° W, T=280.3°
G/E = 1.2° W, T=270.3°
G/E = 1.7° W, T=290.3°
What is the amplitude of the sun, if the vessel’s position is 14°27’N, 120° 33’E, the sun’s declination is 05° 00.8°, bearing of the sun is 092°?
E 5.2° N
W 5.2° N
E 11.1° N
W 11.1° N
Sinong Pogi?
Capt. Cabrejas
C/O Viernes
Capt. Paje
2/O Streegan
Anong masarap na pagkain sa Sodexo?
Fried Bangus
Sinabawang Bangus
Brocolli
Cauliflower
Ilang beses kang naliligo sa isang araw?
Hindi uso ang ligo
Isa
Dalawa
Toothbrush lang
NOSI SAM BAKLA?
Quidem
Patulot
Jandoc
Nasi
Mamaradlo
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