Date: 201407
Local time of day: 1201-1800
Location: MYR.TRACON, SC
Light: Daylight
Aircraft: Fighter
Operator: Military
Operating under: Part 91
Flight plan: VFR
Mission: Tactical
Flight phase: Cruise
Airspace: Class A ZJX
ATC / advisory: TRACON MYR
Reporter organization: Government
Reporter function: Approach
Reporter qualification: Air Traffic Control Fully Certified
Human factors: Communication Breakdown; Training / Qualification
Anomaly: ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Air Traffic Control
When detected: Taxi
Result: Air Traffic Control Separated Traffic; Flight Crew Returned To Clearance
Contributing factors: Aircraft; Airspace Structure; Procedure
Primary problem: Procedure

Narrative: I was working East Radar; with all Radar functions combined to East Radar; and there was a CIC in the TRACON. Aircraft X was handed off to me from ZJX. The ZJX Controller told me they wanted to work Gamecock Charlie; and Rob Roy MOAs. After initial call from Aircraft X; I cleared them into Gamecock Charlie AOB 10;000; and Rob Roy AOB FL220. The pilot read back the clearance saying he was cleared into Gamecock Bravo & Charlie MOAs. I corrected the pilot; reissuing the clearance into Gamecock Charlie and Rob Roy. This time the pilot read it back correctly.We assign aircraft to squawk XXXX while operating in our MOAs; (we are the controlling agency for Gamecock Charlie and Rob Roy). Approximately 10 minutes after being cleared into the MOAs; I noticed an aircraft squawking XXXX riding the eastern border of Rob Roy; and eventually turn left; exiting the airspace. I broadcast on the MOA frequency; 'Aircraft X; check spill-out; east of Rob Roy.' This aircraft remained about 5 miles east (outside) of the Rob Roy MOA; for almost 10 miles of flight; before returning to the confines of Rob Roy. (This area east of Rob Roy; is part of Gamecock Bravo; which can only be activated with 30 days advance notice.) About a minute after I made the 'Check spill-out' broadcast; a ZJX Controller told me that Aircraft X was outside of the MOA. ZJX had reason to be concerned; as a CHS RNAV Arrival route is just east of the Rob Roy MOA.1. We have a LOA with the Air Force Base. This LOA defines the Gamecock MOAs; (Alpha; Bravo; Charlie; and Delta; and Rob Roy airspace); and covers responsibility for controllers and pilots. The Fighter Wing consists of 3 squadrons. We have no issues with the Fighter Wing; as they have complete knowledge and understanding of these Special Use Airspaces. We do; however; often have problems when other military flights come to use these MOAs. My guess is; over the last 10 years; we see them once every few months. And more often than not; they spill out of their assigned airspace.2. As I said earlier; this happens all too frequently with these flights. It is unsafe; and my wish is to prevent something tragic from occurring. Since the aircraft are not a signatory to our LOA; I suggest we not issue them clearance into the MOAs; until they are a signatory to our LOA. Then we could assume that their flight crews are properly briefed on the Special Use Airspace(s).




Synopsis: MYR Approach Controller reports of a spill out close to an RNAV Arrival.