GNAV

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The diameter of the Earth is approximately – 12 700km.

What is the approximate circumference of the earth – 40 000km

The radius of the earth is approximatley? - 6350km

The maximum difference between geocentric and geodetic latitude occurs at about? - 45degrees North and South

The direction of the Earth's rotation on its axis is such that? - Observed from the point above the North Pole, the rotation is counter clockwise

Conversion angle is? - The angular difference between the rhumb line and the great circle between two positions, measured at any f the positions

The great circle distance between position A (59degree34,1'N 008degree0,8,4'E) and B (30degree25,9'N 171degree51,6'W) is? - 5400NM

The term "departure" used in navigation also has the following meaning: - Distance in direction East/West, given in nautical miles

A line drawn on a chart which joins all points where the value of magnetic variation is zero is called an? - Agonic line

What is the initial Great Circle track from Sydney , Australia (30degreeS150degree E) to Buenos Aires, Argentina (30degreeS 030degreeW)? - 180degreeT

Consider the following statement no the properties of a great circle: The great circle running through two positions on the surface of the earth, is the shortest distance between these two positions.

What is the distance in kilometres for 49degreeS 180degree E/W to 58degreeS 180degree E/W? - 1000km

A straight line drawn on a chart measures 4,63cm and represents 150NM. The chart scale is? 1:6000000

Consider the following statement on "departure": - As the latitude increases, the departure between two meridians decreases

The magnetic equator is best defined as? - An acline line

What is the initial Great Circle track from Porto Alegre, Brazil (29degree12'S 05degree 00'W) to Durban, South Africa (29degree12'S 031degree 00'E)? - 110T

What is the approximate latitude of the Antartic Circle? - 66 1/2degree South

The Convergency of Meridians? - Is the angular difference between the meridians

Parallels of latitude, except the equator, are? - Rhumb lines

You start from P (70degree 00,0' N 015degree 00,0'E) and fly westward along the parallel of latitude or 2 hours t GS 220 kt. What is your longitude after two hours flight? - 006degree 26,0' W

Equation for calculating convergency angle – 0,5 x Convergency angle (1/2 x mean sin lat)

An aircraft at latitude 02´20N tracks 180´T for 685 kilometres. What is its latitude at the end of its flight? – 03´50´S

What is the change of longitude between A (45´00N 163´14E´) and B (31´33N and 157 02E ´) – 06'12´W

The direction of the initial great circle track from C (48S 170W) to B (58S 150W) is 130´T. What is the final direction of the track? – 114.

An aircraft is on a heading of 354 ´C. Variation is 2W and Deviation 8E. What is the aircrafts true heading? – 360 / 00

An aircraft at position 60´00´N 05 00´W follows a track of position 090 ´T for 315km. On completion of the flight the longitude will be:

The direction of the initial great circle rack from A (40N 080E) to B (20N 150W) is 060T. What is the final direction of the track at B? - 125T

The direction of the initial great circle from C (48S 170W) to B (8S 150W) is 130T. What is the final direction of the track at B? - 114T

An aircraft at position 60'00,0'N 05'00,0W follows a track of 90' (T) fr 315 km. On competition of the flight the longitude will be? - 000'40,0'E

Parallells of latitude except the equator are? - Rhumb lines

Consider the following statements on the properties of a great circle – The great circle running through two positons on the surface of the earth, is the shortest distance between these two positions.

Isogonals are lines of equal magnetic declination connecting all points.

The term departure used in navigation also has the following meaning: Distance in direction East/West, given in nautical miles.

At the magnetic equator – dip is zero

In the Southern Hemisphere, the true direction of an westerly Great Circle will - Increase

In the Northern Hemisphere, the true direction of an westerly Great Circle will – Decrease