Fantom Zorbin and MPN11,
No, Danny had not heard of it, either ! But VMC or IMC, any GCA operator or Caravan Corporal on a Pilot FTS was in peril of his life all the time regardless. I suppose we were better off as we couldn't see what was coming across the grass!
I worked MPN11s at Thorney Island, Geilenkirchen and Leeming. Never saw a Dosimeter at any of them. The only advice we were ever given was: "Don't hang about in front of the "hot" side of the truck when it's running !"
I think the original Allisons in the Power Truck were replaced by Rotary Converters to convert our 230V 50 cycle mains supply to the 120V 60 cycle that the MPN-11 liked. The Geilenkirchen solution was to power the truck from a Bachem (?) mobile diesel generator outside. As I believe these were air-cooled, they made a deafening row.
Danny.