Unfortunately, even the best systems fail.....
The NTSB released its final report last week on the October 2002 midair crash of two Cessna 172s in Coral Springs, Fla., in which two people died.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The failure of the dual students and flight instructors on both N9840V and N6101F to see and avoid each other, which resulted in a midair collision.
CG