Loss of communications

Question 1

Occasions when TIBA (traffic information broadcasts by aircraft) might
be introduced

Answer 1

If significant disruption to ATC or related services occurs, and under TIBA procedures pilots provide their own separation. If a known disruption is expected, NOTAM action will be used to advise pilots.

Question 2

TIBA procedures with respect to VHF frequencies to be used

Answer 2

If TIBA is promulgated through NOTAM, the frequency will be included in the advice. If an unplanned disruption occurs, the frequency should be the one normally used for the airspace you are in. If more than one frequency is promulgated for that airspace, use the primary frequency (which you can find in the COM section of AIPNZ Volume 4)

Question 3

TIBA procedures with respect to A listening watch

Answer 3

A listening watch on the appropriate frequency should be maintained from 10 minutes prior to entering a given airspace until leaving that airspace. If leaving an aerodrome within the limits of designated airspace, a listening watch should be started as soon as possible before or after takeoff.

Question 4

TIBA procedures with respect to Times of broadcasts

Answer 4

Always give as much advance notice as possible of your intentions. Broadcasts should be made:
- 10 minutes prior to entry into designated airspace
- As soon as possible before or after takeoff
- 10 minutes prior to crossing a reporting point
- 2 - 5 minutes prior to changing altitude
- At the time of changing altitude, and on reaching the required altitude
- Any time the pilot considers it necessary