Originally Posted by
balus man
including the united 777 that turned right heading 130 climbing 5000 off 07L in recent weeks, this is the third incident with aircraft turning towards high terrain below 1000 feet. CAD currently have a requirement for helicopters to squawk standby within 5 miles of CLK which is counter to ICAO requirements. It is more of a problem than the buddha and CAD continues to refuse to address the matter.
This is not the 3rd incident. Over the years, there have been many incidents like this. You just don't know about them.
With regard to helicopters turning off their transponders, It was pointed out strongly by the more experienced controllers to ATC Management at the time this was brought in, that it was not only illegal in accordance with ICAO and Hong Kong Regulations, but dangerous. The decision was made by CAD due to very strong pressure from Cathay Pilot Management after a number of Cathay pilots put in MORs because they got TCAS 'Traffic' alerts when rotating or just after rotate from inbound helicopters. This happens because of the predictive nature of the way TCAS works, which doesn't know the track a helicopter is going to take.
All departing traffic is given traffic information on these helicopters, so it should come as no surprise that there may be an occasional traffic alert. By getting CAD to get the helicopters to turn off their transponders, they have now deprived pilots of seeing said helicopters on their TCAS. All because they are annoyed by a TCAS 'Traffic' call. It also deprives controllers from seeing the helicopter on their radar, depending on the radar configuration.