So because the Fixed wings all have TCAS now and all a/c have transponders there is a new "problem" of numerous TA`s in the Cape Town CTR especially around the extended centreline and approach path.
Question: Whose problem is it? ATC, the PC`s/ Heli`s or the Operators with TCAS. What must be done? How far behind/ ahead and at what alt must the "proximate" traffic be not to "irritate" the TCAS? Well from my info there is no definitive answer due to different models integrated into different airframes with different avionics. So even if you "educate" the VFR chopper pilot what will you tell him/her?
At present heli`s can no longer overfly the Apron so that leaves the tower or the thresholds behind departing arriving traffic. A well informed heli pilot will pass behind and slightly above - wake turbulence - How far behind is enough - obviously aim to miss...how far not to inititiate a TA - you tell me. ATC also want the Heli`s to expedite this exercise so they can keep the movements going.
ATC to inform of possible TCAS traffic - they do when they can - but hey nothing stopping you a la Etihad from asking before blasting off - It`s actually an Airbus recommendation to use the TCAS to help build up your SA before taking off or landing.
So Fixed Wings are "suffering" numerous TA`s at Cape Town during approach and landing in controlled airspace - the solution is to do away with the other traffic?