Originally Posted by
Wizofoz
And? Nothing is fool proof. Gliders thermal close together- even when gliders are obviously in visual contact, someone can mess up, be distracted, join to aggressively. Remember the two TCAS equipped airliners who still managed to collide?
In TCAS accident one pilot was following ATC instructions and another pilot was following TCAS instructions.
I don't think two gliders were gliding in controlled airspace..