Navigation 2
Navigational Skills Quiz: Celestial Navigation
Test your knowledge and skills in celestial navigation with this comprehensive quiz. Designed for enthusiasts and professionals alike, this quiz challenges you with questions on various aspects of maritime navigation using celestial bodies.
Key Features:
- 30 detailed questions
- Multiple choice format
- Applicable for navigation training
When determining the position of the ship in the morning using celestial bodies , initially taken data is from those which are:
In the west
In the south
In the north
In the east
With a marine sextant are measured angles up to:
90°
100°
110°
120°
The plane, which is perpendicular to the plane of the observer's meridian, determines the direction:
North - south
North - east
North-east - south-west
East - west
The plane of the observer's meridian determines the direction:
East - west
North-east - south-west
Soutj - west
North - south
On the circular system for determining the four cardinal points the observer's plane is divided:
From 0° to 180°
From 0° to 90°
From 0 to 400 gradians
From 0° to 360°
On the circular system for determining the four cardinal points the reading is:
From the north to the west (counter-clockwise)
From the south to the east (counter-clockwise)
From the south to the west (clockwise)
From the north to the east (clockwise)
On the semi-circular system for determining the four cardinal points the observer's plane is divided:
From 0° to 360°
From 0° to 90°
From 0 to 400 gradians
From 0° to 180°
On the quaternary system for determining the four cardinal points the observer's plane is divided:
From 0° to 180°
From 0° to 360°
From 0 to 400 gradians
From 0° to 90°
On the rhumb system for determining the four cardinal points the observer's plane is divided:
From 0° to 360°
Into 32 radians
From 0 to 400 gradians
Into 32 parts
One rotation of the Earth is:
From the east to the west
Around the Sun
Around the Moon
From the west to the east
A person on the north pole:
Will not observe the rotation of the Earth
Will observe a clockwise rotation of the Earth
Will observe the rotation of the Earth in the direction of rotation of the Moon
Will observe the counter-clockwise rotation of the Earth
The upward direction determined by a free-falling plumb-line in any given point of the earth's sphere is called:
Nadir
Pole
Vertical
Zenith
The basic circles in First equtorial system are:
The observer's meridian and the true horizon
The meridian of the point of the vernal equinox and the celestial equator
The zero meridian and the true horizon
The observer's meridian and the celestial equator
The basic circles in Second equtorial system are:
The observer's meridian and the celestial equator
The observer's meridian and the true horizon
The zero meridian and the true horizon
The meridian of the point of the vernal equinox and the celestial equator
The altitude h of the celestial body is an angle:
At the centre of the celestial sphere between the plane of the equator and the direction of the celestial body
At the centre of the celestial sphere between the plane of the zero meridian and the direction of the celestial body
At the centre of the celestial sphere, equal to 90° minus the angle between the plane of the equator and the direction of the celestial body
At the centre of the celestial sphere between the plane of the true horizon and the direction of the celestial body
Practical hour angle is:
An hour angle from 0° to 90°
An hour angle from 180° to 360°
An hour angle from 0° to 360°
An hour angle from 0° to 180°
The addition to the declination up to 90° (90° - δ) is called:
Sidereal hour angle
Zenith distance
Parallax
Polar distance
A visible sunrise is name of the situation when:
The lower edge of the Sun touches the horizon
The lower edge of the Sun is 2/3 away from its vertical diametre above the horizon
The centre of the Sun is on the line of the horizon
The upper edge of the Sun touches the horizon
A true sunrise is the name of the situation when:
The lower edge of the Sun touches the horizon
The upper edge of the Sun touches the horizon
The centre of the Sun is on the line of the horizon
The lower edge of the Sun is 2/3 away from its vertical diametre above the horizon
The visible daily movement of the celestial bodies is done on:
Verticals
Meridians
The celestial equator
Parallels
The Moon completes one rotation around the Earth for:
Approximately 18 days
Half an year
One year
Approximately one month
The altitude of a celestial body changes the slowest if:
The celestial body is rising
The celestial body is located on the Іst vertical
The celestial body is setting
The celestial body is around its transit
The azimuth of a celestial body changes the fastest if:
The celestial body is rising
The celestial body is located on the Іst vertical
The celestial body is setting
The celestial body is around its transit
The basic circles in the horizontal coordinate system are:
The observer's meridian and the celestial equator
The meridian of the point of the vernal equinox and the celestial equator
The zero meridian and the true horizon
The observer's meridian and the true horizon
The relation between ship's time (Ts) and Greenwich time (Tgr) is:
Тs = Тgr + N(E)
Тs = Тgr + Uhr
Тgr = Тs + N(E)
Тs = Тgr +/- N(Е/W)
Local time is the name of the time measured from:
The Greenwich meridian
The meridian of the point of the vernal equinox
Random meridian
The observer's meridian
All observers positioned on the same meridian:
Have different local time
Have the same local time only if they are in the same hemisphere
Have different Greenwich time
Have the same local time
The instrument correction "s" of the sextant:
Is determined on board of the ship
There is no such correction
Is not read in practice
Is taken from the passport of the sextant
When the ship is moving towards the celestial body, its maximum altitude can be measured:
When the celestial body is on the observer's meridian
Before the transit of the celestial body
When the celstial body is in apogee
After the transit of the celestial body
For exact determining of the position of the ship using celestial bodies is needed:
The celestial bodies to have an altitude more than 70°
The celestial bodies to have an altitued smaller than 15°
The celestial bodies to almost blend with the horizon
The celestial bodies to have an altitude not less than 25°-30°
When determnining the distance to a reference point of a vertical angle α, which way for determining the index correction''i' of the sextant is the most accurate?
Using the horizon
Using the Sun
Using the passport of the instrument
Using a landmark on shore
If transference Δh is with a minus sign, it is entered:
In the direction of the azimuth of the celestial body
The sign of the transference does not matter
It is not entered
In a direction opposite of the azimuth of the celestial body
To determine astronomicly the position of the ship are needed:
At least four celestial bodies
Not less than three celestial bodies
At least three celestial bodies
At least two celestial bodies
When observing three celestial bodies, the position of the ship is inside the triangle of errors if:
The celestial bodies are positioned in one half of the horizon
The position of the celestial does not matter
The celestial bodies are at approximately the same altitude above the horizon
The celestial bodies are positioned evenly on the horizon
The observer orientates the star globe by:
The local hour angle of the celestial body and its declination
Greenwich time and sideral hour angle
Ships time and longitude
Sidereal time Sm and latitude
Arguments for entering the Nautical almanac are:
Date and ship's time
Date and standard time
Greenwich time without date
Date and Greenwich time
On the star globe are marked:
All possible stars
The navigational stars and the planets which do not have a parallax
Stars, planets, Sun and Moon
Only the brightest stars
To determine the exact compass correction it is needed:
For the celestial body to have an altitude not smaller than 30°
For the celestial body to have an altitude not smaller than 45°
For the celestial body to have an altitude bigger than 60°
For the celestial body to have an altitude smaller than 25°-30°
The determining of the compasses error by astronomical method is not affected by:
An error in the longitude up to 50 miles
An altitude of the celestial body bigger than 30°
Errors in the latitude and longitude up to 1 mile
Errors in the latitude and longitude by up to 30 mile
The navigator of the ship with 165°E longitude observes the Sun in standard time 14 h. 25 m. 04 s. on 21st September. What is the GMT and the date in Greenwich at the moment of observation?
02 h. 25 m. 04 s., 21st September
01 h. 25 m. 04 s., 21st September
01 h. 25 m. 04 s., 20th September
03 h. 25 m. 04 s., 21st September
What does the decrease in size of the triangle of errors mean when changing the quantity of each of the three measured compass bearings by +2° and their secondary mapping on the navigation chart?
The triangle is created by accidental errors
The triangle is created by systematic mistakes and the entered change increases the error influence on the correction of the compass
The decrease in the size of the triangle is inversely proportional to the quantity of change of the compass bearings
The triangle is created by systematic mistakes and the entered alteration decreases the error influence on the correction of the compass
When measuring a horizontal angle between two landmarks on shore using a sextant, the navigational isoline is:
A straight line
Hyperbola
Ellipse
Circle
A more detailed navigational information for the elements of the charts contents can be found on:
Small scale charts
Geographic chart
Topographic chart
Large scale charts
When entering a port in the USA, you see a green buoy. This means:
Leave me on your starboard side
A buoy for fresh water
Pass on my port side
Leave me on your port side
The preliminary notices are entered on the charts:
With a pencil and are written at the bottom of the chart under the outter frame with purple ink
With a pencil and are written at the bottom of the chart under the outter frame also with a pencil
With a pencil and are written at the bottom of the chart under the outter frame also with a pencil, as well as in the 'journal for corrections of the navigational chart' with a pen
With a pencil and are written at the bottom of the chart under the outter frame also with a pencil, as well as in the 'journal for corrections of the navigational chart' with a pencil
You are on a ship at 04.00 o'clock standard time on 3rd July in the 8th east hour zone. What is the GMT?
12.00, 3rd July
20.00, 3rd July
12.00, 2nd July
20.00, 2nd July
The planned navigational definitions, when sailing close to shore or narrow region, must:
Have an accuracy not less than 4 cables
Have an accuracy recommended by the navigational officer
Have an accuracy according the procedures of the company
Have maximum accuracy
Determining the position the ship using the 'bearig running fix' method is done by:
Simultaneous observations of 2 or more landmarks
A hoizontal angle and distance to the shore
Simultaneous observations of 1 landmark
Non-simultaneous observations of 1 landmark
The correction of the navigational charts is done:
Only aboard of the ship by the responsible for the task navigational officer
By the publisher
Only in specialized offices
Aboard the ship and in speacialized offices
The errors made when measuring the navigational quantities in their character are:
Fixed and repetitive
Positive and negative
Increasing and decreasing
Gross, systematic and random
On 04.04.2001 г. at 23 h. 56 min. Your longitude 179о59' W. After 8 min. Your longitude is 179о59' E. What will be the local time and date?
00 h. 04 min. on 04.04.2001
00 h. 04 min. on 05.04.2001
00 h. 04 min. on 03.04.2001
00 h. 04 min. on 06.04.2001
In the weekly notices to mariners is included information for the correction of:
Only for the nautical publications
Only for the navigational charts
Facsimile charts
charts and nautical publications
Aboard of the ship it is mandatory to receive and store:
The monthly notices to mariners
The half-year-round notices to mariners
The storage of notices to mariners is not mandatory
The yearly and weekly notices to mariners
The received notices to mariners aboard the ship are kept in storage for a period of:
3 years
5 years
2 years
According to the ISM procedure of the company
What does the term 'isoline' in navigation mean?
The line which connects the ship with the observed object
The line marking the travelled by the ship passage in one course
A line with the same shape everywhere around the globe
The line in which from every point the observer receives the same data of the measured navigational parametre
Where are the corrections made to the navigational charts, in accordance with notices to seafarers, recorded?
In the ship's journal
only in the chart's catalogue
in the entry journal of the notices
in the bottom left corner of the charts and the correction journal
For making the act of correcting easier some of the notices to mariners are accompanied by:
Pictograms
Labels
Pilots charts receipts
Tracings for charts
If a notice to mariners is accompanied by 'Block for Chart №…' :
It is attatched to the charts catalogue
It is covered in the ship's journal
It is attatched to the documents of the voyage
It is glued as a correction to the corresponding chart
When can the navigational officer apply corrections in the navigational charts and nautical publications?
On watch
Only during stay
During non-working hours
When he is free of duty
When is it required to correct all navigational charts and publications on board of the ship?
When PSC is requested
When it is stated in the ship charter
When the ship goes into repairs
According to ISM Code procedure of the company
Who makes the overall correction of all the navigational charts and nautical publications according to an ISM Code?
The watchkeeping officer waiting for the ship
Free-of-duty people part of the crew part, on their own accord
the Maritime Administration
A specialized office
At which geographical latitudes does the nautical mile have the smallest value?
At the poles
At the tropics
At the middle latitudes
At the Equator
The Admiralty number of a chart is located:
Inside the borders of the inner frame of the chart
Between the inner and the outter frame of the chart
In the upper right corner of the chart
Outside of the outter frame of the chart
A point with coordinates: φ = 43˚16'7N и λ =028˚07'4E is located in the:
Northern hemisphere, its western part
Southern hemisphere, its west part
Southern hemisphere, its eastern part
Northern hemisphere, its eastern part
A point with coordinates: φ = 67˚58'5S и λ =178˚05'8W is located in the:
Western hemisphere, its northern part
Southern hemisphere, its eаst part
Northern hemisphere, its eastern part
Southern hemisphere, its western part
Angle on the bow is called:
The angle between the north part of the meridian and the direction to a certain landmark
The angle between the north part of the meridian and the direction in which the ship is moving
The angle between the beam of the ship and the direction to a certain landmark
The angle between the centerline plane of the ship and the direction to certain landmark
The true course (TC) is measured in degrees :
From 0° to 90°
From 0° tо 180°
From 0° to 45° port and starboard side
From 0° to 360°
On the route chart we plot the value of the:
Compass course
magnetic course
Aspect angle
True course
The true bearing (TB) is measured in degrees :
From 0° to 180°
From 0° to 90°
From 0° to 045° abeam
From 0° to 360°
On the route chart are drawn the values of the:
Compass bearing (CB)
Magnetic bearing (MB)
Reciprocal compass bearing (RCB)
True bearing (TB)
The angle on the bow is measured:
From 0° to 360°, counter-clockwise
From 0° tо 90° - port and starboard side
From 0° to 45°abeam
From 0° to 180° to port and starboard side
Courses and bearings are drawn on the navigational chart with the help of:
Divider
Protractor
Slide rule
Navigational triangle or protactor
The radius of the Earth is:
6731 km
6378 km
6399 km
6371 km
Main points and circles of the Earth are:
North, south, east, west
Geographical longitude and latitude
The differences in meridional parts
North pole, south pole, Equator, parallels and meridians
The base for determining geographical coordinates is:
The directions of the magnetic arrow - north and south
The observer's plane and vertical
The directions: zenith and nadir
The directions: north, south, east and west
The Equator divides the Earth in:
Western and eastern hemisphere
Northern and southern part
Southern and western part
Northern and southern hemisphere
The main meridian divides the Earth in:
Northern and western hemisphere
Southern and eastern hemisphere
Southern and northern part
Eastern and western part
You are at a point with longitude 144°E. The date is 6th February and in the time zone it is 08.00 o'clock. The Greenwich time and date are:
23.00 h. 5th February
17.00 h. 6th February
18.00 h. 6th February
22.00 h. 5th February
The ship's time is the name of the time of:
The Greenwich meridian
The meridian at the port, to which the ship is headed
The meridian at the port, from which the ship departs
The time zone, which the ship's clocks are set to
When changing the ship's time:
A note in the journal for checking the ship's clocks is made
It is mandatory for a note in the journal for regulating the board chronometre to be made
It is mandatory for a note in the machine journal to be made
It is mandatory for a note in the log book to be made
What is important to be done when a GPS is used to plot a position on a chart?
To read the position correctly
To plot the position correctly
To make sure that the chart is corrected
To make sure that the chart and the GPS have the same datum
What is most important when transferring the voyage plan to other navigational systems?
That the two systems are from the same manufacturer.
That the two systems are approved by the classification organisation.
That the two systems work according to their specification.
That the two systems use the same chart datum.
The satellite navigational system NAVSTAR uses satellites:
In lower orbits
In higher orbits
In stationary orbits
In middle orbits
What is the parameter measured for determining the position of the ship in the NAVSTAR system:
The difference in distances on the orthodrome and the loxodrome between two points
The difference in distance between two satellites and the ship in different moments
The difference in speed of two satellites and the ship at the same moment
The distance between a few satellites and the ship at the same moment
The satellite radionavigational system NAVSTAR determines the coordinates of the ship, with a reference to:
Krasovskii ellipsoid
A sphere
WGS - 72 ellipsoid
WGS - 84 ellipsoid
The way the NAVSTAR system works is represented by:
Comparing the position of the ship from the chart with its GPS coordinates
Comparing the position of a fixed point on the Earth with its chart coordinates
Comparing the GPS position of a fixed point on the Earth with its calculated coordinates on the vessel
Comparing the position of a fixed point on the Earth with its satellite coordinates
The rotation period of the satellites in COSPAS-SARRSAT system around the Earth is:
12 hours
24 hours
6 hours
105 minutes
The satellites in the GLONASS system:
Are 24 but in regular operation are 15
Are decreasing after expiration of the operational period of some of them
Are 20 but the system gradually takes itself out of operation
Are inceasing but 24 are in regular operation
In the GLONASS system, in any given moment and in every point of the Earth can be seen at least:
3 satellites
8 satellites
4 satellites
5 satellites
In the regions with geographical latitude of more than 75˚:
The GLONASS system has weaker coverage than the GPS system
The GLONASS system has the same coverage as the GPS system
The GLONASS system and the GPS system are unusable
The GLONASS system has better coverage than the GPS system
How many orbits do the satellites in the GLONASS system use?
8 orbits
5 orbits
12 orbits
3 orbits
Which is the European analogue of the GLONASS system?
GPS
GARMIN
NAVSTAR
GALILEO
The horizontal accuracy of the position given by GLONASS is:
Steady - 15 metres
Variable and depends upon the air flow in the vicinity of the receiver
Steady - 20 metres
2 metres approximately in combination with GPS
What is the height of the satelite orbits in the positioning system GALILEO?
A little over 19 kilometres
A little over 20 kilometres
A little over 21 kilometres
A little over 23 kilometres
The GALILEO system is created to consist of:
24 satellites in 3 orbits, 8 in each
24 satellites in 3 orbits, 7 active and 1 back-up for each of them
40 satellites in 5 orbits, 7 active and 1 back-up for each of them
30 satellites in 3 orbits, 9 active and 1 back-up for each of them
The GPS system is controlled by:
USA Ministry of Messages
European comission
Organisation of the United Nations
USA Ministry of Defence
In how many orbits do the satellites in the GPS system travel?
3 orbits
4 orbits
5 orbits
6 orbits
What are the structural segments of the GPS system?
Cosmic, ground, subsidiary
Satellite, coastal, oceanic
Control, satellite, consumer
Cosmic, control, consumer
What is the reason GPS satellites transmit a signal of two carrier frequencies?
To avoid the possibility of loss of the signal during its reflecting from the troposphere
One frequency is a base frequency, the other one - an alternative one
To compare the time it takes for the signal to reach the consumer for higher accuracy
to eliminate the error resulting from the signal delay during its passage through the ionosphere
The way the GPS system works is based on the so-called "TRILATERAL method". What is this?
The position of a point is determined as the point of intersection of several circles with unknown radius but with known coordinates of the centre
The position of a point is determined as the point of intersection of three circles with unknown radius but with known coordinates of the centre
The position of a point is determined as the point of intersection of three circles with known radius but with unknown coordinates of the centre
The position of a point is determined as the point of intersection of several circles with known radius and coordinates of the centre
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