Actually, the seat in the F-16 is an Aces II, not a Martin Maker. While it
is zero-zero, this does not count for a downward flight vector. As I recall,
the parameters for insuring a good chute are around 2000 feet agl in
controlled flight, and 8-10,000 feet in uncontrolled flight. Also, the most
common cause of fatal accidents is due to delayed ejection.

I have around 60 hours in the back of F-16's as a flight surgeon, and our
recurrent training always emphasized these numbers.