"W. D. Allen Sr." wrote
Ada was always seemed a solution in search of a problem! The USAF tried to
cram Ada into sixty four K of rad hard memory in the Peacekeeper ICBM
guidance system. They finally recognized that Ada had far too much
overhead
precluding meeting all the time line functional requirements of a
multi-warhead missile.

ICBM navigation and control actually requires very little compute. The NS-20
GNC for Minuteman III used a rotating drum memory and performed adds and
multiplies in about 20ms, just in time for the correct location on the drum
to come around and be written.