So your 'clearance' below A060 signifies your lack of knowledge.
Really?
For the purpose of flights to the Ross Dependancy civilian operators accept the USN and FAA ATC procedures utilised by military aircraft as mandatory.
Promulgation of radio navigation information at McMurdo was the responsibility of the USN who installed, calibrated and maintained in accordance with TERPS. This manual was standard for the FAA, USAF, USN, US Army and the US Coast Guard. However, because of the special nature of the operations in Antarctica the aids and ATC procedures were installed specifically for the Antarctic Support, Operation Deep Freeze aircraft. Promulgated procedures are intended for use by Operation Deep Freeze aircraft only, others may use at their own risk.
Perhaps you can fill us in with the relevant USN and FAA procedures applying at McMurdo at the time. The airline was not aware of the procedures in place at the time.