Yes, that is true Bill. In the event of a Nuclear or Biological attack the crew were closed up and sealed and filtered air drawn in. In that case they had a boiling vessel which would be used to cook Compo rations etc. It was mostly for liquid type foods, drink or from tins.
AFV's and some transport vehs. also were fitted with them. I have seen them retro-fitted in other vehs.In my time a Baby Burco powered off the Generator 27.5Kva allowed hot water for all purposes.
Brit. Comp was issued in 10 man packs and had variations in menu, Bacon packed in a tin rolled up in grease proof paper and when opened tipped into a pan and fried up was very good. Some had salmon but that always seemed to go to the Officers mess. The tinned pudds were popular and the chocolate and boiled sweets.
The US 'K' rations were totally different, as each was an individual ration. Ever seen a tinned roll? they included cigarettes and toilet paper and matches and a tin opener of course. The cardboard outers when used as a fire would heat the meal quite well. They had Turkey, Ham with Pasta (Not too nice that) They would freely swop their rations for ours.
Calorie wise the meals value was quite high, something 2500 plus, enough to keep a man going all day, various supplemental food was also available like oranges and some fresh veg.
I would forage widely while out on exercise, finding eggs and fields with produce and orchards. Hitler during his time ordered that fruit trees be planted alongside roads where soldiers would train so in the Autumn plums and apples would be found in areas where we would be positioned.
I often came home with a kit bag full of fist sized potatoes.
Clive
Edited By Clive Hartland on 26/04/2016 09:39:30