An Australian navy ship towing high-tech ping detection gear borrowed from the U.S. Navy heard a ping that lasted for 2 hours and 20 minutes. Then, doubling back, it picked up two distinct pings for 13 minutes. A commercial jetliner has two black boxes, each with a pinger, so if plane wreckage is down there two pings is what the searchers should hear. These pings were 37.5 MHz, the unique frequency of aircraft pingers. The ocean depth there is about 14,800 feet, and it may take several days to determine if plane wreckage is on the sea floor there. This location is 345 miles away from where Chinese searchers claim they heard a ping using hand-held gear. The black boxes can’t be in both places. But hey, you never know! Maybe the sea gods will give Amelia Earhart to the Chinese as a consolation prize.