Flashcards in 09 Magnetic Direction Deck (14):

1

## What are the three types of direction and how are they related?

###
- True Direction

- Corrected by the Variation gives

- Magnetic Direction

- Corrected by Deviation gives

- Compass Direction

2

## What is Variation?

### Variation is the Angular difference between the True direction and the Magnetic Direction

3

## What is the minimum and maximum the Variation can be?

### Between 0 degrees and 180 degrees

4

## When given a Variation or Deviation of + or - what do these relate to?

###
+ is East

- is West

These symbolise what happens to the magnetic direction to give the true direction

5

## What is the phrase regarding Variation and East and West?

###
Variation West, Magnetic Best

Variation East, Magnetic Least

6

## What are Isogonal Lines?

### Lines of equal Variation

7

## What are Agonic lines?

### Lines of zero Variation

8

## Where on the earth is a compass most accurate?

### At the equator

9

## What is the maximum dip angle and where is it found?

###
- 90 degrees

- At the North and South Poles

10

## What is an Aclinic line?

### A line of zero dip angle

11

## What is the definition of Deviation?

### Angular difference between the Magnetic direction and the Compass Direction

12

## What is the phrase regarding Deviation and East and West?

###
Deviation West, Compass Best

Deviation East, Compass Least

13

## What is the accuracy limit for a Direct Reading Compass (DRC)?

### + - 10 degrees

14