Possible Clues:

• "Good buddy" on the air, once
• Bear trap fearer
• Trucker's 'good buddy'
• Many a semi pro?
• Speaker of words like alpha and bravo
• Smokey spotter with a radio, say
• One with a handle on the transportation industry?
• Trucker who broadcasts
• Person who might say '10-4, good buddy'
• One who asks 'Got your ears on?'