Directions

Question 1

True north

Answer 1

Has a direction along a meridian towards the geographic North Pole

Question 2

Magnetic North

Answer 2

Direction towards the magnetic North Pole

Slowly moving west annually by 15kms.

Question 3

Compass north

Answer 3

The compass affected by the a/c local magnetic fields

Angle between Magnetic North and Compass North.

Question 4

Variation

Answer 4

Difference between true and magnetic

Given as east or west

Biggest variation is 180*

Question 5

Lines of equal magnetic variation

Answer 5

Isagonal

Question 6

Lines of zero variation

Answer 6

Agonic

Question 7

Deviation

Answer 7

Difference of magnetic and compass.

Question 8

Lines of equal dip

Answer 8

Isoclinic

Question 9

Lines of zero dip

Answer 9

Aclinic

Question 10

Rhumb Line

Answer 10

• Lines of equal heading and direction
• Closer to Equator
• Easy to navigate, NOT shortest route however.
• Equator and Meridian

Question 11

What is a Great Circle and a Rhumb Line

Answer 11

Equator and Meridian

Question 12

Vertices or a single vortex

Answer 12

Points furthest North/South on a great circle,

Same North/South latitude, as they are opposite each other.

Question 13

Antipode

Answer 13

Points directly opposite each other.

~ Vertices

Question 14

Nodes

Answer 14

Point at which the track goes through the equator

Halfway between each vortex