An aircraft flew into the bjc class D airspace without an ATC clearance. The aircraft was confused b...

Attributes
ACN	1312418
Time
Date	201510
Local Time Of Day	0001-0600
Place
Locale Reference	BJC.Tower
State Reference	CO
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	VFR Route
Flight Plan	VFR
Person 1
Function	Local Supervisor / CIC
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 1
Events
Anomaly	ATC Issue All Types Airspace Violation All Types Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

I observed an unknown aircraft from the south. When I reached out to him; he told me he was flying the VFR corridor. He was a few miles west of the established corridor but it was easy to see why he became confused. No traffic was in the area and I did not pursue any action against this violator since a) he seemed genuinely confused and b) there was no other traffic in my airspace to be a factor.the airspace immediately east of the class D airspace contains a VFR corridor that allows aircraft to transition without talking to us. Looking at the VFR flyway planning chart on the reverse side the extreme western edge of this corridor juts into our airspace. That has the potential to put VFR aircraft in close proximity to the arrivals we have landing and departures. I propose a class D extension be created on the eastern edge of our airspace to contain this portion of the corridor. This way; we have more control over the aircraft in this area and can alert them to any aircraft in their proximity.

Original NASA ASRS Text

Title: An aircraft flew into the BJC Class D airspace without an ATC clearance. The aircraft was confused by the VFR flyway planning chart and thought they were outside of the Class D.

Narrative: I observed an unknown aircraft from the south. When I reached out to him; he told me he was flying the VFR Corridor. He was a few miles west of the established corridor but it was easy to see why he became confused. No traffic was in the area and I did not pursue any action against this violator since a) he seemed genuinely confused and b) there was no other traffic in my airspace to be a factor.The airspace immediately east of the Class D airspace contains a VFR corridor that allows aircraft to transition without talking to us. Looking at the VFR Flyway Planning Chart on the reverse side the extreme western edge of this corridor juts into our airspace. That has the potential to put VFR aircraft in close proximity to the arrivals we have landing and departures. I propose a Class D extension be created on the eastern edge of our airspace to contain this portion of the corridor. This way; we have more control over the aircraft in this area and can alert them to any aircraft in their proximity.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

An aircraft flew into the bjc class D airspace without an ATC clearance. The aircraft was confused by the VFR flyway planning chart and thought they were outside of the class D.