CVR Transcribing Team
Have been checking this out. Chippendale was not one of the team. The three were Capts. Cooper & Wyatt, and F/E Olliff. Cooper was a union man, Wyatt was a company man, and Olliff was the senior F/E.
Their transcript did not contain "Bit thick in here Bert". That was added by Chippendale went he had the tape analysed again, and then removed by Mahon when Mahon had the tape analysed again.
The tape, as I understand things, is now with Archives NZ - and is probably completely worn out.