The only reason the TCAS RA recorded was because NAS 2b introduced mandatory transponders for the first time for all VFR aircraft in the airspace above Launceston.
The RPT crew never sighted the Tobago so if the pilot had flown in exactly the same place a month before without a transponder and un announced no incident would have been recorded.
I'd like everyone to take their time and ponder this for a while
