Originally Posted by
Nomde plume
WhisprSYD, 10 mins isn’t based on when the call was made, it’s based on estimated departure and arrival times. Which obviously were coincident. Per AIP:
What’s the ETD for someone who taxies at 1111?
1114? 1117? 1119? 1130?
or do you want traffic information based on Flight plan etd?
see the issue - only reliable times the controller has for basing the assessment are time at taxi, inbound pilot estimate or radar verified system estimate, and ATD when it’s given.
Usual procedure is give traffic to anyone within 10 mins at time of taxi (plus a minute or two for mum) - then update if necessary on departure which is what appears to have happened here..
At 14 mins prior to the collision the inbound aircraft may still have been air working at another aerodrome with a 30 minute delay set.. we don’t know any of that
The important thing is that the inbound aircraft is aware of the pending departure, which it was here.