Radio Equipment, Frequencies, Coverage and SELCAL/Transponder-Related Communications
Core concepts
You must know the radio equipment requirements for VFR in Brunei: VHF radio, transponder, and ELT. Key concepts: frequencies: Brunei Tower 118.7, Ground 121.7, Approach 119.7, ATIS 127.0. Know the transponder codes and the phrase 'squawk'. Understand SELCAL (selective calling) is used on HF, not VHF. Traps: confusing frequencies; forgetting to set the transponder to Mode C; not knowing the difference between primary and secondary radar. Also, know the phrase 'ident' and 'squawk ident'. Worked example: 'Brunei Approach, Cessna Five Six Alpha Bravo, squawk ident.' Rule of thumb: always check the frequency and transponder code before transmitting.
Key points
- Know the local frequencies: Tower 118.7, Ground 121.7, Approach 119.7.
- Set transponder to Mode C (altitude reporting).
- SELCAL is for HF, not VHF.
- 'Squawk ident' means press the ident button.
- Know the emergency codes: 7500, 7600, 7700.