I wonder if the "NEC" stamped on the end of the cartridge shown above is related to the term "Net Explosive Content" that we used to use in Transport Command?
I seem to remember that carrying passengers (except troops) with a cargo which had an NEC of more than 200 lbs was not allowed, for example.
Somebody mentioned AVPIN. This was a highly flammable and volatile substance that no one ever wanted to carry.
So, we are getting towards the very end of 1975 and 39 Sqn with Canberra
PR.9s are heading for Jamaica to re-map the place. Two Britannias and one Belfast are in support. On the way through Bermuda, the Britannia carrying the AVPIN forgets to offload it.
Result; New Years Day and we are invited to fly Belfast XR367 back to Bermuda from Montego Bay with a 5 gallon can of AVPIN so that the 39 Sqn Canberras can start their engines!
Our original destination from Montego Bay was Charleston AFB, South Carolina so going back to Bermuda was just a little bit of a major dogleg!