Small Aircraft; High Wing; 1 Eng; Fixed Gear
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 4
Situational Awareness; Confusion; Training / Qualification
ATC Issue All Types; Conflict NMAC
Air Traffic Control Issued Advisory / Alert
Airport; Procedure; Human Factors; Environment - Non Weather Related
I was working the local control position; conducting training. The trainee cleared Aircraft X for takeoff to fly straight out. Aircraft Y was upwind north pattern; requesting short approach. The trainee extended their upwind; gave Aircraft X a right turn to the north (towards Aircraft Y). I was watching the situation; saw they were going to get close; and called aircraft Y to tell them about Aircraft X passing off their nose; left to right. Aircraft Y acknowledged; and said that was a NMAC for them.
[Report narrative contained no additional information]
A Local Controller Trainee cleared an aircraft for takeoff and issued a right turn towards a helicopter in the pattern upwind.