Mia approach controller reported of a VFR aircraft skirting below the mia class bravo. While legal; ...

Narrative:

I was working during a morning arrival bank. I was vectoring aircraft X for a visual approach to runway 8L at mia. I observed a VFR aircraft tracking northbound right along the western edge of the mia class bravo airspace 10 miles west of the airport at 2900 feet. While I understand that is completely legal; it is highly unsafe. This has been an ongoing problem for a long time here at miami and it is only getting worse. I am told we cannot make a change until these start to get documented; so I will start as such. The current bravo airspace extends precisely to the outer markers at mia and 100 ft beneath those markers. If aircraft troll along the edge of this space 100 ft beneath they cause problems with all aircraft into miami due to keeping them high on approaches and create unstable descents; while also cause ras delaying aircraft further. This airspace needs to be changed.I propose the bravo be extended at least 1000ft lower beneath the 10 mile fixes and extended out another 5 miles at 3000. This is not only for the landing traffic safety; but with the vast amount of heavy traffic that lands miami it would help protect these little vfrs from an abundance of wake turbulence coming off of said inbound aircraft.

Original NASA ASRS Text

Title: MIA Approach Controller reported of a VFR aircraft skirting below the MIA Class Bravo. While legal; this causes separation conflicts with traffic inbound to MIA. Reporter suggested changes to the Class Bravo.

Narrative: I was working during a morning arrival bank. I was vectoring Aircraft X for a visual approach to Runway 8L at MIA. I observed a VFR aircraft tracking northbound right along the western edge of the MIA class bravo airspace 10 miles west of the airport at 2900 feet. While I understand that is completely legal; it is highly unsafe. This has been an ongoing problem for a long time here at Miami and it is only getting worse. I am told we cannot make a change until these start to get documented; so I will start as such. The current bravo airspace extends precisely to the outer markers at MIA and 100 ft beneath those markers. If aircraft troll along the edge of this space 100 ft beneath they cause problems with all aircraft into Miami due to keeping them high on approaches and create unstable descents; while also cause RAs delaying aircraft further. This airspace needs to be changed.I propose the bravo be extended at least 1000ft lower beneath the 10 mile fixes and extended out another 5 miles at 3000. This is not only for the landing traffic safety; but with the vast amount of heavy traffic that lands Miami it would help protect these little VFRs from an abundance of wake turbulence coming off of said inbound aircraft.

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.

Attributes
ACN	1401815
Time
Date	201611
Local Time Of Day	0601-1200
Place
Locale Reference	MIA.TRACON
State Reference	FL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural FAR Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Mia approach controller reported of a VFR aircraft skirting below the mia class bravo. While legal; this causes separation conflicts with traffic inbound to mia. Reporter suggested changes to the class bravo.