Thanks much for the info.
What is the difference between a class C and class D cargo hold?
I wonder what a wired infra red system would be any good?
Do you think pilots would be confident that there was a false alarm if they had cameras to let them see the belly so then not divert?
I suppose it could also allow them to make a ditch decision of the fire is raging away and they better land in the next 5 minutes or they will lose control and crash.