Narrative:

I was ojti on the r-side with a trainee. It was the first day back from weekend and within 30 mins of the beginning of our shift. Traffic; WX; radios; etc. Was not a factor with the exception of a terrible understanding of the rules/responsibility of the trainee/tower; by the trainee; during the application of visual separation between an arrival and a departure. Aircraft Y was inbound to gck for runway 17 approximately 7nm due east of the field with the runway airport in sight cleared for the visual approach and I believe switched to tower frequency. Tower then calls and requests release on aircraft X off runway 17 and offers to provide visual separation. Without any hesitation; the trainee approves the call and releases aircraft X. Simultaneously; I got up out of my chair from behind/adjacent the trainee to see for myself where aircraft X was headed which was on course to arv which I had no idea where it was at. Immediately; I asked the trainee where this airport was and he responded to the north/northeast. A discussion quickly ensued about whether or not this was acceptable since the tower was providing visual separation. This happened so quickly; I didn't have a chance to stop it before we hung up with gck tower. However; I quickly figured out where this destination was and I could have prevented this by calling back to the tower. I went against my better judgement by not doing this wanting my trainee to rise to the occasion to fix the situation he created not knowing at the time he didn't understand that the tower is providing visual to get the aircraft off the ground but 'doesn't care' after he's in the air and that it's our job as radar controllers to ensure separation after the departure phase. I wanted the trainee to see and work through the mess he created. After departure; aircraft X flew right towards the inbound aircraft Y of course; the trainee simply watched the situation before I keyed up to turn the aircraft X 20R. Separation had been lost at that point and trainee did not perform as expected. I take full responsibility of the loss of separation and wish I would have handled this differently. I definitely learned something as a relatively new ojti in how far to let a trainee go. Although I was just filling in as an instructor and only trained this trainee 2-3 times now; I wish I would have had a better understanding of the knowledge of this trainee. Although I never would have guessed at this stage in his training; in his mind; visual separation takes care of everything.

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Original NASA ASRS Text

Title: ZKC Developmental Controller releases an aircraft from a Tower controlled airport and instructs the Tower to use visual separation. Aircraft comes onto ZKC Controller's radio and Controller is confused on how the Tower provided the use of visual separation.

Narrative: I was OJTI on the R-side with a trainee. It was the first day back from weekend and within 30 mins of the beginning of our shift. Traffic; WX; radios; etc. was not a factor with the exception of a terrible understanding of the rules/responsibility of the trainee/tower; by the trainee; during the application of visual separation between an arrival and a departure. Aircraft Y was inbound to GCK for runway 17 approximately 7nm due east of the field with the runway airport in sight cleared for the visual approach and I believe switched to tower frequency. Tower then calls and requests release on Aircraft X off runway 17 and offers to provide visual separation. Without any hesitation; the trainee approves the call and releases Aircraft X. Simultaneously; I got up out of my chair from behind/adjacent the trainee to see for myself where Aircraft X was headed which was on course to ARV which I had no idea where it was at. Immediately; I asked the trainee where this airport was and he responded to the north/northeast. A discussion quickly ensued about whether or not this was acceptable since the tower was providing visual separation. This happened so quickly; I didn't have a chance to stop it before we hung up with GCK tower. However; I quickly figured out where this destination was and I could have prevented this by calling back to the tower. I went against my better judgement by not doing this wanting my trainee to rise to the occasion to fix the situation he created not knowing at the time he didn't understand that the tower is providing visual to get the aircraft off the ground but 'doesn't care' after he's in the air and that it's our job as radar controllers to ensure separation after the departure phase. I wanted the trainee to see and work through the mess he created. After departure; Aircraft X flew right towards the inbound Aircraft Y of course; the trainee simply watched the situation before I keyed up to turn the Aircraft X 20R. Separation had been lost at that point and trainee did not perform as expected. I take full responsibility of the loss of separation and wish I would have handled this differently. I definitely learned something as a relatively new OJTI in how far to let a trainee go. Although I was just filling in as an instructor and only trained this trainee 2-3 times now; I wish I would have had a better understanding of the knowledge of this trainee. Although I never would have guessed at this stage in his training; in his mind; visual separation takes care of everything.

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.