Narrative:

Aircraft Y called approach and said 'louisville approach this is aircraft Y we are down here over the river at 1500 under your airspace just letting you know we are here'. I typed in a local VFR flight plan and gave aircraft Y the squawk code. I scanned the area for a 1500 foot target somewhere near the river and saw one by 6 mile island at 1600 feet indicated. As soon as aircraft Y tagged up at 1500 feet indicated the target was collision alert alarming with aircraft X who was descending through 2000 feet on a visual approach to runway 17L. I feel I did not have time to use the prescribed phraseology and needed to get aircraft Y turned immediately. I told aircraft Y traffic was on a 4 mile final for 17L and he needed to turn east bound immediately. Aircraft Y said he had the traffic in sight and wanted to fly down the river eastbound. Aircraft Y was told to maintain visual separation and proceed as requested. This facility is in dire need of class B airspace. Due to the proximity of sdf to many small uncontrolled airports along with an active army airport it is exceedingly common that our; mostly heavy jet; traffic has to be vectored around small GA aircraft and military helicopters. We have a towered field less than 4 miles from sdf and a very active uncontrolled field on a 10 mile final when we are south. Along with restricted airspace within 12 mile final when we are north. These cause many aircraft who are landing at the uncontrolled field or aircraft that are avoiding the restricted airspace to fly through our finals. Changing our airspace to class B would help keep those that request radar services safer and decrease delays while keeping unpredictable small aircraft who do not want radar service safe from wake turbulence dangers away from the bulk of our heavy jets.

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Original NASA ASRS Text

Title: SDF TRACON Controller and SDF Tower Controller reported a close airborne conflict between an IFR aircraft conducting an approach and a VFR aircraft in the vicinity of the final approach course which had just contacted the TRACON Controller. Both Controllers insist the airport needs more restrictive airspace to protect aircraft on the Instrument Final Approach course.

Narrative: Aircraft Y called Approach and said 'Louisville Approach this is Aircraft Y we are down here over the river at 1500 under your airspace just letting you know we are here'. I typed in a local VFR flight plan and gave Aircraft Y the squawk code. I scanned the area for a 1500 foot target somewhere near the river and saw one by 6 mile island at 1600 feet indicated. As soon as Aircraft Y tagged up at 1500 feet indicated the target was Collision Alert Alarming with Aircraft X who was descending through 2000 feet on a visual approach to Runway 17L. I feel I did not have time to use the prescribed phraseology and needed to get Aircraft Y turned immediately. I told Aircraft Y traffic was on a 4 mile final for 17L and he needed to turn east bound immediately. Aircraft Y said he had the traffic in sight and wanted to fly down the river eastbound. Aircraft Y was told to maintain visual separation and proceed as requested. This facility is in dire need of Class B airspace. Due to the proximity of SDF to many small uncontrolled airports along with an active army airport it is exceedingly common that our; mostly heavy jet; traffic has to be vectored around small GA aircraft and military helicopters. We have a towered field less than 4 miles from SDF and a very active uncontrolled field on a 10 mile final when we are south. Along with restricted airspace within 12 mile final when we are north. These cause many aircraft who are landing at the uncontrolled field or aircraft that are avoiding the restricted airspace to fly through our finals. Changing our airspace to Class B would help keep those that request radar services safer and decrease delays while keeping unpredictable small aircraft who do not want radar service safe from wake turbulence dangers away from the bulk of our heavy jets.

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.