coracle and threemiles:
Thanks for the answers, I had a feeling that Mode-S would come into it somewhere. However I didn't realise that the VSL was so tightly linked with the aircraft and MCP settings.
Also worth to know is that IAS is interrogated, too, and any deviations from a mandated speed are now subject to comments from ATC.
Does the system get data on instantaneous IAS or does it return the speed set in the MCP?
When EIN152 passes FL116, then it has left FL120
Of course, the old 'will be deemed to have vacated a level when the altitude indicates 400ft below the vacated level'. At that point I assume the EIN would drop into the FL110 slot.
So, what would occur on-screen if say 7KD reads back FL120 but puts FL110 in the MCP thus putting itself in potential conflict with the Shamrock? Is there any in-built STCA in the VSL?
Thanks