Narrative:

Aircraft was established on a right downwind for runway 33 at pompano beach airpark. Opposing aircraft was established on a left downwind for runway 33. Tower controller was dealing with multiple aircraft in the pattern/airport environment. No landing clearance was issued to either aircraft while on downwind leg. Unaware of the other aircraft on left downwind; pilot flying began to turn right base for runway 33. Once established on base; we noticed the other aircraft turning left base and final for runway 33. Our aircraft was ahead of the other aircraft turning final. Tower controller issued a landing clearance to our aircraft that we were going to be number 2 to land when we were ahead of other aircraft and established on base. Other aircraft was approaching closer so evasive action was taken to avoid conflict giving less than 300 ft horizontal separation and 100 ft vertical. We were then instructed to turn final and given landing clearance. Tower controller may have lost positional awareness of both aircraft involved. There were also multiple aircraft with similar call signs operating in and around airport pattern. Tower controller did not issue any alerts or instructions to our aircraft until we were on base leg. After the conflict; tower controller did not say anything pertaining to situation. Tower controller could have issued an alert that there was traffic on an opposite pattern and could have provided sequencing or separation instructions to either aircraft. Believed that controller lost position awareness of our aircraft; we were ahead of other aircraft and were given landing clearance to follow aircraft behind us.

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Original NASA ASRS Text

Title: C172 in the pattern for PMP experienced a conflict with traffic on an opposite base leg absent any traffic information provided by ATC.

Narrative: Aircraft was established on a right downwind for Runway 33 at Pompano Beach Airpark. Opposing aircraft was established on a left downwind for Runway 33. Tower Controller was dealing with multiple aircraft in the pattern/airport environment. No landing clearance was issued to either aircraft while on downwind leg. Unaware of the other aircraft on left downwind; pilot flying began to turn right base for Runway 33. Once established on base; we noticed the other aircraft turning left base and final for Runway 33. Our aircraft was ahead of the other aircraft turning final. Tower Controller issued a landing clearance to our aircraft that we were going to be number 2 to land when we were ahead of other aircraft and established on base. Other aircraft was approaching closer so evasive action was taken to avoid conflict giving less than 300 FT horizontal separation and 100 FT vertical. We were then instructed to turn final and given landing clearance. Tower Controller may have lost positional awareness of both aircraft involved. There were also multiple aircraft with similar call signs operating in and around airport pattern. Tower Controller did not issue any alerts or instructions to our aircraft until we were on base leg. After the conflict; Tower Controller did not say anything pertaining to situation. Tower Controller could have issued an alert that there was traffic on an opposite pattern and could have provided sequencing or separation instructions to either aircraft. Believed that Controller lost position awareness of our aircraft; we were ahead of other aircraft and were given landing clearance to follow aircraft behind us.

Data retrieved from NASA's ASRS site as of April 2012 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.