Electric Gyro and Magnetic Compass

Question 1

What does the Turn Coordinator (TC) show?

Answer 1

It shows the rate of turn and rate of roll.

Question 2

What is the power source for the Turn Coordinator?

Answer 2

It works off a direct current electric source.

Question 3

How long does a standard rate turn take?

Answer 3

One standard rate turn with a wing on the left or right hash mark is a full circle in 2 minutes.

A 90° standard rate turn takes 30 seconds.

Question 4

What is deviation in magnetic compass errors?

Answer 4

Deviation is due to electrical fields in the cockpit.

Question 5

What should you check for deviation?

Answer 5

You should check the compass card.

Question 6

What is variation in magnetic compass errors?

Answer 6

Variation is the difference between true heading and magnetic heading.

Question 7

What is the mnemonic for dealing with variation?

Answer 7

East is least, west is best.

Question 8

How do you calculate magnetic heading from true heading when there is east variation?

Answer 8

Subtract east variation from true heading to get magnetic heading.

Question 9

How do you calculate magnetic heading from true heading when there is west variation?

Answer 9

Add west variation to true heading to get magnetic heading.

Question 10

What is magnetic dip?

Answer 10

Turns from a northern heading show a lag, while turns from a southern heading show a lead.

To roll out on the correct heading, use UNOS (Undershoot North Overshoot South).

Question 11

What does acceleration indicate in terms of compass errors?

Answer 11

Speed changes show a turn.

This is referred to as ANDS (Accelerate North/Decelerate South).

Question 12

Describe the errors a magnetic compass may experience.

D
V
M
O
N
A

Answer 12

Deviation
Variation
Magnetic Dip
Oscillation
Northerly Turning Errors
Acceleration/Deceleration Errors

Question 13

Name the five hazardous attitudes:

A I I M R

Answer 13

Anti-authority (“Don’t tell me!”)

Impulsivity (“Do it quickly”)

Invulnerability (“It won’t happen to me!”)

Macho (“l can do it.”)

Resignation “What’s the use?”

Question 14

What is a VOR and how does it work?

M A G I C RADAR

Answer 14

Magnetic North orientation

Azimuth Information transmitted to the aircraft

Ground station transmitting signals

Identification in Morse Code (and Voice, in some cases)

Courses providing 360 TO/FROM radials

RADAR as a nod to navigation and reception of VOR signals