Theory

Question 1

earth shape

Answer 1

The actual shape of the earth is an oblate spheroid.

is called geoid

Question 2

measure

Answer 2

compression of the earth is 0.3% around 1/300

earth diameter at the equator is 23 NM or 43 km more than in the pole

Question 3

WGS 84

Answer 3

it the gps/american reference of the world 1984.

ICAO adapted als the WGS 84 as world standard

Question 4

Poles

Answer 4

extremites of the axis about which earth spins

inclinated aboud sun orbit of 23.5°

Question 5

cardinal point

Answer 5

N
E
W
O

Question 6

quadrantal

Answer 6

NW
NE
SE
SW

Question 7

sexagesimal

Answer 7

360 angle

Question 8

Position referece cystem

Answer 8

define position accurentely and unambigousy on etarh sfc

Question 9

Great circle

Answer 9

is the shorted distance between 2 point
so is the shorter arc between 2 point .

2 point in eath sfc will be will be join only from 1 circle unless they are to the opposite side

Question 10

example of freat circle

Answer 10

equator

Question 11

meridian

Answer 11

are semi great circle

Question 12

small circle

Answer 12

is a cìrcul where the radius and the centre is not the earth center -> parallel

Question 13

max difference geodetic and geocentri

Answer 13

is at 45° N/S about 11.6°’ of arc

Question 14

special parallel

Answer 14

artic circle 66.5 ° N
antartic 66.5° S
Cancer 23.5° N
Capricorn 23.5° S

Question 15

Vertex

Answer 15

are the Northest or southest point of a great circle, when you are in the vortex you can only move left or right

Question 16

crossing point

Answer 16

is a great circle that pass from the equator

Question 17

rhumb line

Answer 17

is a regulary curved line on the eart surface witch cut the meridian at the same angle

Question 18

special rhumb line/ equator

Answer 18

equator and meridians with antimeridian they are rhumb line and great circle

Question 19

measure

Answer 19

1 km= 3280 ft
1 m = 3.28 ft
Satus mile = 5280 ft
ICAO definition of NM is 1852 m
NM= 6080 feat

Question 20

nautical miles

Answer 20

nautical miles at the equator is shorter 6048
NM at the poles is longer 6108
becuase the definition is that a NM is lenght of an arc in 1 great circle with an angle of 1 minute