Loss of Communications - ATS Equipment Failure 

2.18.2 State the occasions when TIBA (traffic information broadcasts by aircraft) might be introduced.

• Traffic Information Broadcast by Aircraft –TIBA. 
• Full details about TIBA are given in AIPNZ Volume 4 ENR, Section 1.8. 
• TIBA will be introduced if a disruption to ATC occurs and pilots will then need to provide their own separation. 
• If the disruption is expected then information regarding its broadcast and times will be in the NOTAM.

2.18.4 Detail the TIBA procedures with respect to:

(a) VHF frequencies to be used;

Pilots are to follow frequency instructions issued by ATS. If not instructed by ATS and there is a complete ATS communication failure, refer to the TIBA Frequency Map — North Island (Figure ENR 1.15-1) and TIBA Frequency Map — South Island (Figure ENR 1.15-2).

The purpose of these maps is to allow:

   (a) The distribution of relevant traffic to relevant frequencies;

   (b) A higher probability of contacting a ground based unit for assistance;