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WorksheetsNav - Form and Direction of Earth
Total questions: 47
Worksheet time: 39mins
Earth is best described as...
An oval
A spheroid
An oblate oval
An oblate spheroid
What direction does Earth spin when looking from below (South Pole)?
anticlockwise
clockwise
Which of these statements is incorrect?
A great circle plane passes through the centre of the Earth
A great circle must pass through the north and south poles
The Equator is a great circle
A great circle bisects Earth into two equal parts
Compared to any other circle a great circle has...
The greatest radius and greatest curvature
The smallest radius and least curvature
The greatest radius and least curvature
The smallest radius and greatest curvature
The shortest distance between two points on Earth is found with a...
Great circle
Small circle
Rhumb line
Which of these are correct?
Every parallel of latitude is a small circle
Every meridian of longitude is a small circle
A small circles plane does not pass through the Earths centre
A small circle cuts all meridians at the same angle
A rhumb line is...
Select all that apply
Cuts all meridians at the same angle
Cuts all parallels at the same angle
Is the shortest distance between 2 points
is used for navigation simplicity
The datum for latitude is ____ and reaches a maximum of _____.
the equator, 180 degrees
the prime meridian, 180 degrees
the equator, 90 degrees
the prime meridian, 90 degrees
1nm is defined as a ____ arc on a great circle
1 second
1 minute
1 degree
60 degrees
What is the distance between 30º55'00"N and 10º00'00"S on the 145º00'00"E meridian?
2455nm
1255nm
1255km
2455km
1nm = ____ft
5280
3280
6080
7500
Longitude of a point is...
The angular difference from the anti meridian expressed up to 90º
The angular difference from the prime meridian expressed up to 180º
The angular difference from the anti meridian expressed up to 180º
The angular difference from the prime meridian expressed up to 90º
A single meridian indicates...
East/West direction in ºM
East/West direction in ºT
North/South direction in ºM
North/South direction in ºT
A single parallel indicates...
East/West direction in ºM
East/West direction in ºT
North/South direction in ºM
North/South direction in ºT
Select all incorrect statements
All parallels of latitude are great circles
The magnetic poles are in fixed locations
All meridians of longitude are small circles
Rhumb lines cross all meridians at the same angle
What numerical value is SE?
045
225
125
135
Aeronautical charts show ___ direction
True
Magnetic
Compass
One
What is angle of dip?
The angular difference between the horizontal and Earth's magnetic field lines
The angular difference between true and magnetic north
The angular difference between the horizontal and the magnetic compass needle
The angular difference between the magnetic and compass north
Choose the incorrect answer(s)
Magnetic poles are fixed locations
Geographic poles are fixed locations
Variations changes every year
Deviation is used for true to magnetic calculations
True direction is determined with...
A compass
A compass and deviation card
A compass, deviation card and variation
Magnetic direction and deviation card
Variation is...
The angular difference between true and magnetic north
The angular difference between magnetic and compass north
The angular difference between isogonal and the agonic line
The angular difference between true and compass north
Where is True and Magnetic North the same direction?
when deviation is 0º
on an agonic line
on the isogonal lines
Glenavy, NZ
What is an isogonal?
A line joining places of nil variation
A line joining places of nil deviation
A line joining places of equal deviation
A line joining places of equal variation
What is the magnetic direction?
045ºT, variation 21ºE, deviation 4ºW
066º
049º
024º
041º
What is the compass direction?
218ºM, variation 13ºW, deviation 1ºE
217º
230º
219º
231º
What is the true direction?
175ºC, variation 16ºW, deviation 5ºE
196º
164º
154º
069º
Which of the following is a primary intercardinal?
N
NE
ENE
000 degrees
What time using the clock method corresponds to a relative bearing of 060ºR
10 o'clock
6 o'clock
8 o'clock
2 o'clock
What time using the clock method corresponds to a relative bearing of 300ºR
10 o'clock
6 o'clock
8 o'clock
2 o'clock
To measure true direction line the protractor up with...
the nearest meridian
the nearest parallel
the nearest isogonal
the prime meridian
When variation is nil...
there is no angle of dip
compass and magnetic direction are the same
true and magnetic direction are the same
the compass must be broken
Which of the following equations is correct?
true bearing (ºT) + relative bearing (ºR) = heading (ºT)
true bearing (ºT) + heading (ºT) = relative bearing (ºR)
heading (ºT) + relative bearing (ºR) = true bearing (ºT)
heading (ºM) + relative bearing (ºR) = true bearing (ºT)
Relative bearing is measured from...
anticlockwise from the nose of the aircraft
clockwise from the nose of the aircraft
clockwise from true north
clockwise from magnetic north
HDG = 178ºT
TRK = 165ºT
This is an example of...
left drift
right drift
The prime meridian is designated as longitude
0º N/S
0º E/W
180º N/S
180º E/W
What is the red line intersecting?
Magnetic Poles
Geographic Poles
Flux Lines
The Earth is a large magnet. What is its magnetic field known as?
Magnetic flux
Variation
Magnetic dip
A nautical mile is the length of the arc of a ____ which subtends an angle of ____ at the centre of the Earth.
great circle, 1 minute
great circle, 1 degree
small circle, 1 minute
small circle, 1 degree
A ____ is the length of 1/10,000th part of the average distance between the equator and either pole.
Nautical mile
Kilometre
Statute mile
Mile
1 kilometre is equal to..
Select all that apply
1000 metres
3280 feet
5280 feet
1.856 nm
Select the word set that, when inserted into the gaps of this text, produces a TRUE Statement.
When viewed from space above the North Pole, the earth rotates in a _______________direction and the direction towards which it is moving is defined as ________
anti clockwise, east
anti clockwise, west
clockwise, east
clockwise, west
In navigation, what is the word ‘CONVERGENCE’ used to describe?
the changing angle between great circle tracks and meridians
the curve of a rhumb line as it approaches the geographic poles
the increasing horizontal distance between meridians as they move from the geographic poles towards the Equator
the reducing horizontal distance between meridians as they move away from the Equator towards the geographic poles
Select the set of words that, when inserted into this the following text, produces a TRUE statement.
"The zero-reference plane from which latitude is measured is the ............................. , from which we measure angular displacement in degrees North or South"
Prime Meridian
Anti-meridian of the Prime Meridian
Equator
Greenwich Meridian
TRUE or FALSE?
"Parallels of latitude run parallel to the Earth's rotational axis"
TRUE
FALSE
Given that Nelson aerodrome (NZNZ) bears 292ºT from Wellington aerodrome (NZWN), what is the true bearing of NZWN from NZNS?
112ºT
292ºT
What is the relative bearing of 'A' from the aircraft given that the aircraft is maintaining a heading that is keeping it on track direct to destination 'A' with 7º right drift?
007ºR
353ºR
173ºR
187ºR
What compass cardinal point name is used to describe an aircraft’s position relative to a nominated place in the following circumstance: -
an aircraft is flying a heading 090°M: the nominate place is 090 degrees relative.
NORTH of the nominated place
EAST of the nominated place
SOUTH of the nominated place
WEST of the nominated place
