Making a rare visit to Mackay Airport during the afternoon on Saturday 29 April was Australian Maritime Safety Authority (AMSA) (Cobham SAR Services Pty Ltd) Bombardier CL-600-2B16 Challenger 604 bizjet VH-XNE.
It looked to call into Mackay Airport at the completion of a flight from Cairns which lasted more than five-hours. It is possible that it was 'tasked' to the area as flight-tracking websites suggest that its arrival into Mackay Airport was a 'diversion' from an originally planned landing back at Cairns.
After taking on fuel, VH-XNE was then heard to be using the radio callsign of "Rescue 330" and it departed Mackay Airport and headed out to a position to the North-East of Mackay.
At the completion of its task, VH-XNE "Rescue 330" continued back to Cairns.
It is interesting to note that VH-XNE is usually based at Perth Airport in Western Australia and flew across to Cairns direct from Perth on Wednesday 26 April.
Fellow AMSA Challenger 604 bizjet VH-XND "Rescue 660" is usually based at Cairns Airport and completed a sortie also on Wednesday 26 April but hasn't flown since.
UPDATE! VH-XND returned to the air out of Cairns on Monday 1 May completing a flight from Cairns to Kununurra (Western Australia) while VH-XNE returned to Perth directly from Cairns also on Monday 1 May.
As we've previously reported, Cobham SAR Services Pty Ltd (Cobham) was contracted in 2014 to provide a new new search and rescue agreement for AMSA using four Bombardier Challenger CL-604 bizjets from late 2016 for a period of 12 years. Presently, VH-XND and VH-XNE are joined by VH-XNF which is based at Melbourne (Essendon) Airport in Victoria. VH-XNC seems to be an 'operational spare' and its exact location is unknown - maybe Perth?