Transponders & Altimetry

Question 1

• What is the range of Primary Surveillance Radar (PSR) and where are they located?

Answer 1

• Range of 80nm
• Located in:
  
  • AA
  • WN
  • CH

Question 2

• What is the range of Secondary Surveillance Radar?

Answer 2

• 256nm

Question 3

• What information does Mode A transmit?
  
  • What do you select on the transponder to transmit Mode A?

Answer 3

• Position only.
• Transponder selected to ON

Question 4

• What information does Mode C transmit?
  
  • What do you select on the transponder to transmit Mode C?

Answer 4

• Position and Altitude
• Transponder seltected to ALT

Question 5

• Emergency Transponder Codes

Answer 5

• 7500: Unlawful interferance
• 7600: Comms Failure
• 7700: In flight Emergency

Question 6

• Transponder code when:
  
  • Flying VFR
  • Operating in the VFR circuit

Answer 6

• VFR: 1200
• Circuits: 2200

Question 7

• Transponder code if the pilot of an IFR aircraft flying in the NZ FIR is not yet in reciept of an ATC clearance.

Answer 7

• 2000

Question 8

• What is the minimum FL and when does it change?

Answer 8

• Min FL150 (15,000ft QNE (1013.2))
• When QNH is 980hPa or Less it increases to FL160

Question 9

• Remote QNH Setting and restrictions

Answer 9

If an accurate QNH is not available from an unattended aerodrome the QNH from another aerodrome may be used but a correction must be made to the promulgated MDA as follows:

• Add 5ft to the MDA for every 1nm in excess of 5nm from the source aerodrome.

Restrictions:

• If the approach plate states “Use (local) QNH only” use of remote QNH is not permitted, so the approach cannot be commenced but you can still fly to the aerodrome.
• When flying RNAV approaches to LNAV/VNAV minima. This will be annotated “Use of remote QNH NA”