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Figure 3-1 shows the numbers of Predators, Pioneers, and Hunters lost in Class A
mishaps by year for the period 1986 through 2002. Class A mishaps are those aircraft
accidents resulting in loss of the aircraft (in Naval parlance, “strike”), human life, or
causing over $1,000,000 in damage. These data show a cumulative mishap rate (i.e.,
Class A accidents per 100,000 hours of flight) of 32 for Predator, 334 for Pioneer, and 55
for Hunter (16 since the major reliability improvements in 1996). In comparison to
manned aviation mishap rates, general aviation aircraft suffer about 1 mishap per 100,000
hours, regional/commuter airliners about a tenth that rate, and larger airliners about a
hundredth that rate.