I had a dream the other night that I was flying a plane around the Bay Area, which is odd because I'm no pilot. It was a perfect day for a flight. There wasn't a cloud in the sky, and absolutely zero wind. Perfection!
Anyway, I was tuned in to 115.80 MHz, outbound on the 51° radial, cruising along at 120 knots. At some point, ATC called and informed me that I was to tune into 114.60 MHz and intercept the inbound 264° radial. I radioed my acknowledgement, began my turn, and set my radio. After 151.117 seconds I exited my perfect arc of a turn, having intercepted the 264° radial. Shortly thereafter, I realized that I had been circling a perfect spot for a cache.
N.B. I moved the cache on 20-Dec-2010 to get it out of the poison oak. The information above has been updated to reflect the new location. If you solved the old puzzle, but haven't found the cache yet, I will provide you with the new coordinates if you provide me with old.
You can validate your puzzle solution with certitude.