The theoretical number of traffic calls required is x (x-1) where x = the number of aircraft affected.
eg. 5 aircraft means (theoretically) 5 x 4 =20 traffic calls.
A sixth one calls and it goes up to 6 x 5 = 30 calls.
Then fireflybob calls and it goes up to 42 calls!
Then full RIS becomes uncontainable so it is downgraded to FIS generic warnings....
.....but then 'Duty of Care' raises its ugly head
TDM