{TAIL ~ The transmitter} can be operatively coupled to {HEAD ~ the receiver} to transmit a spread spectrum encoded ranging command in response to a received distress message 
{ TAIL ~ The transmitter } can be operatively coupled to { HEAD ~ the receiver } to transmit a spread spectrum encoded ranging command in response to a received distress message
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH