Tower controller in charge reported that a flight of four aircraft came into the airport and while t...

Attributes
ACN	1447851
Time
Date	201705
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Tower
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Fighting Falcon F16
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Medium Transport
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Supervisor / CIC
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 14.5
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

I was working the controller in charge position in the tower cab with ground control (ground control) and local control (local control) split off. Local control cleared aircraft X for landing or option clearance for runway 15; as they were coming in for a 4 ship initial. Local control departed aircraft Y runway heading off of runway 15 that was eventually going to ZZZ. Local control told the aircraft X flight to break approach end when they were about a 2 mile final and issued the traffic of aircraft Y that was departing. I then reminded local control that with a 4 ship; that the flight will be extended out for aircraft Y that was departing. I then walked over to the left side of the cab to better see the [flight] in their break. Once I seen the 3rd one break and the position of the 4th aircraft; I told local control that they needed to break now. Local control told aircraft X to break and asked if aircraft X [number 4 aircraft] had aircraft Y in site. Aircraft X [number 4 aircraft] replied back negative just as he was breaking over the top of aircraft Y. One of the pilots then said something like 'that was close' or 'a little close'. It was hard to hear which pilot said that live and on the tape.local control needed to recognize that a flight of 4 [aircraft] are going to be pretty spread out. Even an approach end break was still not going to work. Having aircraft Y in a turn to the east and not runway heading created more conflict.

Original NASA ASRS Text

Title: Tower Controller In Charge reported that a flight of four aircraft came into the airport and while they were arriving the Local Controller departed an aircraft which resulted in an airborne conflict.

Narrative: I was working the CIC position in the tower cab with GC (Ground Control) and LC (Local Control) split off. LC cleared Aircraft X for landing or option clearance for Runway 15; as they were coming in for a 4 ship initial. LC departed Aircraft Y runway heading off of Runway 15 that was eventually going to ZZZ. LC told the Aircraft X flight to break approach end when they were about a 2 mile final and issued the traffic of Aircraft Y that was departing. I then reminded LC that with a 4 ship; that the flight will be extended out for Aircraft Y that was departing. I then walked over to the left side of the cab to better see the [flight] in their break. Once I seen the 3rd one break and the position of the 4th aircraft; I told LC that they needed to break now. LC told Aircraft X to break and asked if Aircraft X [number 4 aircraft] had Aircraft Y in site. Aircraft X [number 4 aircraft] replied back negative just as he was breaking over the top of Aircraft Y. One of the pilots then said something like 'that was close' or 'a little close'. It was hard to hear which pilot said that live and on the tape.LC needed to recognize that a flight of 4 [aircraft] are going to be pretty spread out. Even an approach end break was still not going to work. Having Aircraft Y in a turn to the east and not runway heading created more conflict.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Tower controller in charge reported that a flight of four aircraft came into the airport and while they were arriving the local controller departed an aircraft which resulted in an airborne conflict.