Very interesting about our radar in Hawaii. And I agree that radar up on the Oahu mountain tops would have done a better job of detecting the Japanese war planes coming to attack on Dec7th 1941
You should keep in mind that radar was still in its infancy at the time of Pearl Harbor and its value wasn’t widely appreciated. The only actual wartime usage of radar had occurred just one year prior during the Battle of Britain. The two radar operators who spotted the Japanese flight called in their report only to have it dismissed by their superior.