BACKGROUND:  Because the parallel runways at Boston Logan International Airport (KBOS) are closely spaced, Boston Approach is responsible to ensure pilot applied visual separation is employed between aircraft arriving simultaneously. The application of pilot applied visual separation often requires a large amount of back and forth communication between controller and aircrew. This lengthy communication exchange will occasionally cause an aircrew to get in “conversation mode” on the frequency and neglect to use their callsign. If the aircrew does not use their callsign when reading back the controller’s instruction to maintain visual separation, the clearance has not technically occurred and the application of visual separation is thereby invalid. 

Information: Boston Approach is requesting that aircrews inbound to KBOS remain vigilant during the lengthy verbal exchanges that occur to achieve parallel runway pilot applied visual separation and to always use their callsign when reading back all instructions from air traffic control.