i ve used locaters before and they can be very effective. i can put a diver right on top, standing on top of a recorder of a black box. we ve done it before. but in this case, there could be interfering signals coming out. doesn t have to be exactly the same frequency as the pinger, 37.5 kilohertz. but if there were 50 or 100 kilohertz, that s a frequency these used on sound gear looking at depth under the vessel. i wonder if that might be interfering with looking at this signal and determining it. i m glad to hear it s consistent with the pingers. and i wish them the best. arnold, how real is the possibility that even if they do find out that this is one of those pingers that the aircraft is not close enough, is not close by?