Small Aircraft; Low Wing; 1 Eng; Retractable Gear
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3
Communication Breakdown; Confusion; Human-Machine Interface; Situational Awareness
Airspace Violation All Types; Deviation / Discrepancy - Procedural FAR
Air Traffic Control Provided Assistance; Flight Crew Executed Go Around / Missed Approach
Equipment / Tooling; Human Factors
The Local Controller (LC) 2 noticed aircraft X squawking 1200 entering the Class Charlie and tagged the aircraft up with watch to keep all controllers aware of him. I was getting a brief in Clearance Delivery when I noticed it looked like he was joining a 4 mile final. I saw [another aircraft] on about 7 mile final so I immediately called down to the north controller and heard he was already breaking [that aircraft] out. The LC2 and LC1 controllers both keyed up to see if he was on frequency there was no response so I got on Guard to try to get a hold of the aircraft too. I pulled up the shade and gave the aircraft a green light. I don't think he could see it. The lights we have are horrible you can barely see them in the night let alone on a very bright sunny Florida day. I believed he realized he was at the wrong airport and went around right at the approach end and started heading towards the beach. I called OMN Tower to see if they were missing a plane they said no; but Flagler Tower was looking for an aircraft. I told the supervisor and they told them downstairs and it was Aircraft X. They said he landed at FIN turned off the runway and ran out of gas.I have said that the light gun is not good enough to see during the day. You can barely see it at night. I could've prevented what might have ended up a crash because the pilot was confused and probably scared.
A Tower Controller reported they observed an unidentified aircraft not in communication joined short final to their airport than broke off their approach and departed the airspace.