St Kilda is probably the worst place tof a parachute drop as aircraft can be on any of 3 different frequencies. if you're heading from MB to Westgate Bridge/Station Pier you are monitoring EN twr on 125.1, in the other direction you would already be on MB Twr 123.0, in both cases you are leass than 30 seconds from your respective inbound call. Aircraft that are transiting would be on 135.7 ML centre.