Originally Posted by
jojohnson9
The large center display is not a radar indicator. It is a device that showed the aircraft movement when tracking a submarine. A stylus inside moved against the back of special paper and literally scratched a visible line indicating the planes movements. I don't remember the name or the designation of it...it's been almost fifty years since I had to work on one (SP-2E and P-3B). But I do remember that keeping the stylus properly mounted to the strings that drove it was a real pain. Changing the special paper was easy for some, but I seemed to have a knack for screwing it up.
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