Receiving unintentional voice transmissions from GPS satellites
And possibly intentional misuse for criminal and perhaps non-criminal activity too.<p>121.5 and 243 MHz are no longer officially monitored for voice distress signals, but I wonder if they're still being gathered on the fleet.<p>Perhaps the best mitigation, I suppose a reduced set of these signals are monitored for voice distress calls. The satellites should support geofenced/location-selective rejection of signals on 406 MHz and 1544.2 MHz identified as non-emergency traffic to prevent misuse by pirates, drugs dealers, and warlords coordinating attacks.