OK thanks ACMS.
But in fact the HKIA AOM does say Communications shall be maintained.
There may be debate as to what that actually means. But IMHO, what's the point of plugging in the headset if it's left unmanned and untested? Just for decoration?
If there IS any debate don't you think the SAFEST definition should be accepted? Isn't that what we're supposed to do? Prioritise safety?
Why NOT do it?
Is it a cost issue?
Safety first?