As a 9 year-old RAF kid based in Singapore in the very early 1970s, we went on holiday to Penang.
RNZAF Freighters based out of Tengah would fly families up to Butterworth on the West coast of Malaysia.
As passengers boarded, we were handed a set of ear defenders and a cardboard box containing a sandwich.
I distinctly remember that, when using the very rudimentary loo, you could see your pee falling to the verdant jungles of the Camaron Highlands a few thousand (?) feet below!
Dean