Light Transport; Low Wing; 2 Turboprop Eng
Air Traffic Control Fully Certified
Troubleshooting; Situational Awareness
Conflict Airborne Conflict
Air Traffic Control Provided Assistance
Aircraft; Procedure; Airspace Structure
I had 4 TCAS/ Traffic Alerts in a 20 minute period from aircraft departing off of 5C1 and one VFR that flew through my final.Number 1 Aircraft X; VFR 1200 code was at 036 descending from north to south across SAT final headed to 8T8; Aircraft X was a on base turn to SAT descending out of 040 to 030. Traffic issued; closest proximity 1 mile 1/2 and 300 feet.Number 2 Aircraft Y was on a base turn to SAT at 040; VFR 1200 code off of 5C1 climbed right into Aircraft Y on base; closest proximity; merged and 600 feet; traffic issued.Number 3 Aircraft Z was on a turn to final descending to 030. VFR 1200 code departing 5C1 climbed right into final with Aircraft Z; Aircraft Z was stopped at 035; traffic alert issued; closest proximity; merged and 400 feet.Number 4 Aircraft A was level flight at 060 on the downwind for SAT. VFR 1200 code departed 5C1 and climbed through SAT final and north downwind towards Aircraft A. Traffic Issued; closest proximity 1/2 mile and 800 feet.All of these 1200 code aircraft never called Approach to receive service; they stayed 1200 in a very critical part of SAT airspace.The amount of gliders and VFR 1200 codes that routinely fly through our final; base; and downwind is alarming. SAT needs an airspace change to either extend the Class C; or go to Class B airspace to protect our final on all flows. Our final is not protected; I am a member the local safety council at SAT; we have talked to 5C1; and many of the VFR pilots in the area numerous times. The talks are not enough; the VFR 1200 code aircraft continue to compromise safety and something needs to be done before there is a major accident. These examples above happened within 20 minutes of single session I worked today; this is unacceptable. Something tragic will happen if we do not step up and do something about this safety issue; sending us to talk to these pilots and schools is not fixing the problem.
SAT TRACON Controller reported numerous airborne conflicts with various IFR and VFR aircraft the Controller attributes to a needed Airspace Class Change.