Form Of The Earth

Question 1

The Earths Shape

Answer 1

Oblate Spheroid

Question 2

Compression Ratio

Answer 2

1/298

Question 3

EQ Radius

Answer 3

3443. 56nm

6377. 47km

Question 4

Pole Radius

Answer 4

3431. 97nm

6356. 01km

Question 5

1nm

Answer 5

1.852km

6080ft

Question 6

1 degree latitude =

Answer 6

60nm

Question 7

Distance from EQ to Pole

Answer 7

5400nm

Question 8

Circumference of Earth

Answer 8

21600nm

40,003.2km

Question 9

How many minutes in 1 degree

Answer 9

60

1 minute = 1nm

Question 10

Where will 1nm be longest

Answer 10

At the poles and shortest at the EQ

Question 11

Latitude

Answer 11

ANgular distance to a point measured in n/s from EQ

Question 12

Longitude

Answer 12

From Greenwich (GMT/UTC) - 180 degrees east to west
Ante-Meridian = opposite or reciprocal 
On EQ - 1 degree = 60nm but converges towards the poles (cos)

Question 13

Small Circles

Answer 13

Parallels of latitude

Any circle with a different centre

Question 14

Great Circles

Answer 14

Meridians of longitude (EQ)

Have the earths centre as the centre of their circle

Question 15

Parallels of latitude and Meridians of longitude cross at

Answer 15

90 degrees to each other

Question 16

Rhumb Line

Answer 16

A regularly curved line that cuts all meridians at the same angle
Always EQ side of great circle
Concave to nearer pole
Parallels of Latitude are also rhumb lines as they cut meridians at 90 degrees

Question 17

Northern Vertex

Answer 17

The most northerly point

Question 18

Southern Vertex

Answer 18

Most southerly point

Question 19

Antipodal

Answer 19

Opposite locations

Question 20

Crossing Points

Answer 20

Have a 90 degree change of longitude compared to the Northern/Southern Vertex

Both added together will = 180 degrees

Question 21

Track Angle

Answer 21

The angle between the track and the meridian.

Measured clockwise from the meridian.

Question 22

West Bound NV

Answer 22

270 - True

Question 23

Westbound SV

Answer 23

270 + True

Question 24

Eastbound NV

Answer 24

90 - T

Question 25

Eastbound SV

Answer 25

90 + True