SYS - Navigation Systems

Question 1

How do DME hold?

Answer 1

Press NAV/TUNE button until you get DME then hit W2 to put it into hold

Question 2

How know DME is in hold?

Answer 2

Distance is in Amber with an H in front of it

Question 3

What are the main warnings about TCAS use? (4)

Answer 3

Don’t use a primary means of avoiding traffic conflicts
Use only as an aid to visually acquire other aircraft
Unreliable during some manoeuvres
Does not issue RAs

Question 4

What two altitude options does TCAS have?

Answer 4

Relative and absolute (reference to 1013)

Question 5

How long does TCAS absolute altitude display for?

Answer 5

15sec

Question 6

Altitude bands for TCAS Normal, above and below?

Answer 6

Normal = +/-2700ft
Above = +8700ft to -2700ft
Below = +2700ft to -8700ft

Question 7

When does the TCAS range display as blue dots and what does each dot represent?

Answer 7

Range set to 10nm or less, each dot is an ‘o’clock’ position

Question 8

If TCAS cannot determine intruder bearing how is it displayed?

Answer 8

In text at top of HSI eg “TA 10 25” (traffic advisory, 10nm, 2500ft altitude difference

Question 9

Is there a different sensitivity level of the TCAS with gear extended?

Answer 9

Yes, less sensitive eg smaller bubble around the aircraft