Radio synchronized firing control

Claim 1

IN A SEISMIC EXPLORATION METHOD WHEREIN A SEISMIC DISTURBANCE IS CREATED BY APPARATUS POSITIONED AST A SHOT STATION AND THE DISTURBANCE RECORDED BY APPARATUS POSITIONED AT A REMOTE RECORDING STATION, BOTH THE SHOT STATION APPARATUS AND THE RECORDING STATION APPARATUS INCLUDING RADIO TRANSMITTING MEANS AND RECEIVING MEANS FOR COMMUNICATION THEREBETWEEN ON A PREDETERMINED FREQUENCY CHANNEL, THE SEQUENCE OF EVENTS IN SPACED TIME RELATIONSHIP COMPRISING: INITIATING SAID SEQUENCE OF EVENTS BY OPERATING THE RADIO TRANSMITTING AND RECEIVING MEANS AT SAID RECORDING STATION FOR A FIRST PREDETERMINED TIME INTERVAL; TRANSMITTING FROM THE RECORDING STATION TO THE SHOT STATION ON THE PREDETERMINED FREQUENCY CHANNEL A RADIO TIMING TONE SIGNAL AT COMPLETION OF SAID FIRST PREDETERMINED TIME INTERVAL; IN RESPONSE TO SAID TIMING TONE SIGNAL AT THE TERMINATION OF SAID FIRST TIME INTERVAL AUTOMATICALLY CONVERTING SAID SHOT STATION APPARATUS TO THE TRANSMIT CONDITION AND SAID RECORDING STATION APPARATUS TO THE RECEIVE CONDITION; INITIATING A SECOND PREDETERMINED TIME INTERVAL; ACTUATING SAID RECORDING APPARATUS DURING SECOND TIME INTERVAL; INITIATING THE SEISMIC DISTURBANCE AT THE END OF SAID SECOND TIME INTERVAL AND TRANSMITTING A TIME-BREAK PULSE FROM SAID SHOT STATION TO SAID RECORDING STATION ON SAID PREDETERMINED RADIO FREQUENCY; AND RECORDING SEISMIC INTELLIGENCE SIGNALS DURING A THIRD PREDETERMINED TIME INTERVAL.