Geoffrey was part of the commissioning team for the second Empire Flying Boat to be launched, Centaurus, G-ADUT (picture courtesy of Mark Postlethwaite). In White Water Landings he talks about the altitude testing - 10,000 feet with an unpressurised cabin and no oxygen, and the landing when he was sent into the tail section to report on how it felt. He had nothing to hold onto except a few wire struts, and only the airframe skeleton to stand on!
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