You plan on operating within 3NM of Archerfield Aerodrome. What is the appropriate frequency for your operation?

When operating within 3 nautical miles (NM) of Archerfield Aerodrome, it is essential to communicate on the correct frequency to ensure safe and efficient operations. In this context, Archerfield Aerodrome typically operates on the Common Traffic Advisory Frequency (CTAF), where pilots announce their intentions, which helps to maintain safety among all air traffic in the vicinity.

The frequencies provided in the options, particularly 123.6 and 118.1, are common frequencies used at many aerodromes around Australia for pilot communications. At Archerfield, where there is often a mix of recreational and general aviation traffic, utilizing these frequencies allows for effective communication with other aircraft operating in the area.

Since the question asks for the appropriate frequency for operations close to Archerfield, the inclusion of both 123.6 and 118.1 as suitable options (A and B) reflects the practice of monitoring multiple frequencies to enhance situational awareness and maintain communications with all aircraft in the vicinity.

Thus, D is the correct choice, as it recognizes that pilots may need to use multiple frequencies for successful communication while operating near Archerfield Aerodrome.