S-70/UH-60 Blackhawk/Seahawk/Pavehawk/Knighthawk
Air Traffic Control Fully Certified
Air Traffic Control Radar 23
Situational Awareness; Other / Unknown
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Company Policy; Environment - Non Weather Related; Procedure
H60 apparently entered into the protected 'Remnant' airspace behind the B757. Traffic was exchanged and reported in sight and the H60 was told to maintain visual separation from the B757; but I guess I was supposed to say caution wake turbulence. The helicopter was within the 'Remnant' airspace which is supposedly defined as 2;500 FT laterally from the path of the B757. There is no way for a controller to tell where this 'Remnant' exists; therefore there is no way to ensure that another aircraft remains outside of this so-called 'Remnant'! Lesson learned; I'll just say 'caution wake turbulence' in every transmission! Or; give us a tool to let us know where this protected airspace exists.
Controller did not issue cautionary wake turbulence advisory to an H60 passing the wake of a B757 because the Controller had no way of determining 2;500 feet remnant airspace.