Btr instructor and developmental report of a situation where many positions are combined into the to...

Attributes
ACN	1208765
Time
Date	201410
Local Time Of Day	1201-1800
Place
Locale Reference	BTR.Tower
State Reference	LA
Environment
Light	Daylight
Aircraft 1
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	VFR
Aircraft 2
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Ground Instructor Local
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 5
Person 2
Function	Ground Local Trainee
Qualification	Air Traffic Control Developmental
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Narrative:

I was training a new controller on local at the ground control position. The radar was combined in the tower cab. Radar had handed off aircraft X about 5 miles northeast of the airport. Aircraft X was at 600 ft MSL and wanted to transition south. Aircraft Y was inbound on the visual approach to runway 22R. A transition that far east at that altitude should have been no problem for someone on the approach. As it was aircraft Y flight was not given a frequency change to the tower in a timely manner and when he did contact the tower he was a mile from aircraft X at 1;500 ft MSL. The trainee called the traffic and issued a restriction to aircraft Y to maintain at or above 1;500 feet until he was past the traffic. Aircraft Y complied with that and then requested a right 360-degree turn on about a 3 mile final for the descent. The trainee approved that and cleared him to land.the biggest concern for me in this situation is the radar being combined in the tower cab. It puts the trainee on a position (ground control) working local control and radar on (local control) trying to work radar on the d-brite. The tower controller has to look at 55 to 60 miles of airspace rather than 15 to 20 miles. I know it would have been a lot easier to see this situation developing if the d-brite map was on a tower setting. A timely frequency change to the tower would also have been helpful.

Original NASA ASRS Text

Title: BTR Instructor and Developmental report of a situation where many positions are combined into the tower and a conflict arises due to the map scale of the D-Brite. A VFR aircraft conflicts with an arrival inbound to the airport.

Narrative: I was training a new controller on Local at the ground control position. The radar was combined in the tower cab. Radar had handed off Aircraft X about 5 miles northeast of the airport. Aircraft X was at 600 ft MSL and wanted to transition south. Aircraft Y was inbound on the visual approach to runway 22R. A transition that far east at that altitude should have been no problem for someone on the approach. As it was Aircraft Y flight was not given a frequency change to the tower in a timely manner and when he did contact the tower he was a mile from Aircraft X at 1;500 ft MSL. The trainee called the traffic and issued a restriction to Aircraft Y to maintain at or above 1;500 feet until he was past the traffic. Aircraft Y complied with that and then requested a right 360-degree turn on about a 3 mile final for the descent. The trainee approved that and cleared him to land.The biggest concern for me in this situation is the radar being combined in the tower cab. It puts the Trainee on a position (GC) working LC and Radar on (LC) trying to work Radar on the D-BRITE. The tower controller has to look at 55 to 60 miles of airspace rather than 15 to 20 miles. I know it would have been a lot easier to see this situation developing if the D-BRITE map was on a tower setting. A timely frequency change to the tower would also have been helpful.

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.

Btr instructor and developmental report of a situation where many positions are combined into the tower and a conflict arises due to the map scale of the d-brite. A VFR aircraft conflicts with an arrival inbound to the airport.