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Flashcards in Directions Deck (14)
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1
Q

True north

A

Has a direction along a meridian towards the geographic North Pole

2
Q

Magnetic North

A

Direction towards the magnetic North Pole

Slowly moving west annually by 15kms.

3
Q

Compass north

A

The compass affected by the a/c local magnetic fields

Angle between Magnetic North and Compass North.

4
Q

Variation

A

Difference between true and magnetic

Given as east or west

Biggest variation is 180*

5
Q

Lines of equal magnetic variation

A

Isagonal

6
Q

Lines of zero variation

A

Agonic

7
Q

Deviation

A

Difference of magnetic and compass.

8
Q

Lines of equal dip

A

Isoclinic

9
Q

Lines of zero dip

A

Aclinic

10
Q

Rhumb Line

A
  • Lines of equal heading and direction
  • Closer to Equator
  • Easy to navigate, NOT shortest route however.
  • Equator and Meridian
11
Q

What is a Great Circle and a Rhumb Line

A

Equator and Meridian

12
Q

Vertices or a single vortex

A

Points furthest North/South on a great circle,

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

13
Q

Antipode

A

Points directly opposite each other.

~ Vertices

14
Q

Nodes

A

Point at which the track goes through the equator

Halfway between each vortex