Regional Jet 200 ER/LR (CRJ200)
Air Traffic Control Fully Certified
Confusion; Communication Breakdown; Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance
Human Factors
I was the OJTI on West RADAR. The trainee cleared aircraft X for visual approach/short approach to Runway 21; four miles north of the field. It claimed it could not make the descent. I took the frequency at that time because of task saturation of the trainee. I told aircraft one to maneuver as necessary for descent. After dealing with other aircraft sequencing into a satellite airport; noticed aircraft X had crossed final and turned outbound; making a left 270 with aircraft Y on final descending through 3;000 FT approximately 4 miles in trail of aircraft X. I instructed aircraft Y to maintain 3;000 FT and turn away from aircraft X. Never give pilots permission to maneuver as necessary; be directive. OJTI should realize task saturation of trainee sooner.
CHS Controller described a conflict event when indicating to a visual approach aircraft to 'maneuver as necessary' due to altitude resulting in a conflict with a succeeding aircraft