[問題] Grand Canyon collision之VFR on TOP
1956 Grand Canyon mid-air collision 的Air Crash Investigation,
已經可以在youtube 找到.
是說, TWA flight 2 既然是VFR on Top,
它的高度應該是odd thousand + 500 ft, 或 even thousand+500 ft 不是嗎?
怎麼會飛在 21000 ft (導致相撞)?
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