Midair collision between Helicopter and CRJ (AA5342) at Washington (DCA)

[Quickstatus]

(Assuming you meant visual separation not clearance

Thank you - edited.

What is the procedure for verifying (by ATC or by the pilots) that what they are seeing is what they are supposed to be seeing

If pilots can see a taxiway as a runway, i can imagine they can see something other than what they are supposed to see.
....

it’s a control zone under their control, not a pilot wish zone

Unless ATC wants the pilots to request visual separation at DCA?
What is the benefit to the pilot to request a visual separation and what is the benefit to the ATC to approve same?
Has DCA ATC ever refused "visual separation"?.

 

[markis10]

Thank you - edited.

What is the procedure for verifying (by ATC or by the pilots) that what they are seeing is what they are supposed to be seeing

If pilots can see a taxiway as a runway, i can imagine they can see something other than what they are supposed to see.
....



Unless ATC wants the pilots to request visual separation at DCA?
What is the benefit to the pilot to request a visual separation and what is the benefit to the ATC to approve same?
Has DCA ATC ever refused "visual separation"?.

Visual separation helps with traffic flow put simply. At Bankstown which at times has been the busiest tower in the southern hemisphere it’s generally all visual, otherwise we would not get 1600 movements a day. Inbound traffic was given details of other inbound traffic but not details of departing or training circuit traffic. I would normally give an expected sequence number ie IEU, traffic is a MU2 reported at prospect before you joining downwind, expect to be no2 to that aircraft, report sighting.