Read up on your FARs no F/O type ratings on licenses back in the day logbook entry from FAA135 or 121 Operator.
Sully would love it 25 years earlier.
Hey next time before you get scared and hit the panic button the Pressurization panel is overhead switch to manual and close valve before giving yourself an underwear change. If you really did circle Brisbane to burn fuel for 2-2.5 hours think like us yanks, go drop the cargo in Port Moresby at 10,000 feet.... job done customer happy scenic flight NICE.