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#1. Calculate the d’long between position A 165°W and position B 103°W. Aircraft is flying from A to B.

The two points are in same hemisphere Subtract small from large no. 165°-103° = 62°E. (See diagram below) Remember that anti clock movement is East (090°) and clockwise movement is West (270°). When two positions are in different hemispheres the situation is different.

#2. Calculate the d’long between A 165°W and B 170°E. Aircraft is flying from A to B.

See the diagram .

The difference 165° and 180° is 15°.

The difference between 170° and 180° is 10°.

The d’ long therefore is 25°W because the movement is clockwise.

#3. The distance around the Earth along the Equator and around the meridian and antemeridian is

#4. The Earth rotates about it’s

#5. The cardinal points are:

#6. Graticule is the network of meridians and parallels on

#7. The maximum difference between geocentric and geodetic latitude occurs at about:

#8. The ratio of the ellipticity of the earth is 1/297, if the major axis is 6956 km at the equator, what is the minor axis (poles)?

#9. A great circle is any circle on the surface of the Earth whose

#10. The shortest distance between any two points on the Earth is defined by

#11. A meridian is a

#12. For measuring latitude, the datum used is

#13. Latitude is expressed in degrees, minutes and seconds to the North or South of

#14. Rhumb line is a curved line on the Earth cutting successive meridians at the same angle. It is

#15. The only line on the Earth which is both Great Circle and rhumb line is:

#16. The datum for measuring Longitude is called:

#17. The maximum Latitude can be as much as:

#18. Parallels of Latitude and Meridians of longitude on the Earth

#19. Point A is 20°30’N and point B 41°30’S. If an aircraft is travelling from A and B, what is the d’lat?

#20. Earth is a:

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