Here are some Operation Deep Freeze comms monitored last month on satcom. They seemed to have been having some problems with their HF comms that day.
Mac Center forecaster passing updated PSR information to Ice 07. At 0351, Ice 07 reports position BOENZ and estimates JEHOO at 0402.
Ice 07 checking in with Mac Center for departure clearance back to Christchurch. Ice 07 reports departing Pegasus at 0545, estimates BOENZ at 0614, estimate for 60 South at 0824 and ETA to Christchurch at 1048.