Hi, as I responded on the other forum you asked the same question on. Polair will normally be on the main working channel, unless they are on an operation and I can guarantee they will be encrypted if they are on an op, as for NSWPF for Coffs Harbour at the moment they are digital. Westpac will be on airband, VHF marine and more then likely the channel of the agency that has tasked them for a job. Hopefully that helps
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