Small Aircraft
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 4.5
Confusion; Communication Breakdown; Distraction; Situational Awareness
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance
Human Factors; Procedure
Aircraft X was inbound from the South and cleared to land on runway 17R. An amphibious aircraft; was doing touch and go's to the sealane with left traffic. A P28a was also in the left closed traffic pattern for runway 17L. Aircraft Y was inbound from the North requesting runway 17L. I cleared Aircraft Y to land and gave him the traffic for Aircraft X landing the parallel runway. I then noticed the Sea ray had turned an early crosswind and was pointed directly at the P28a. I quickly gave the traffic call and he said he had the aircraft insight.  I then gave him control instruction to insure safety and that the two aircraft wouldn't hit.  While my attention was diverted to the traffic calls Aircraft X had exited the runway and started to taxi. I didn't tell him 'exit the runway and stop; contact ground control on 121.8' as management is now requiring. Ground control noticed Aircraft X continuing to move and told Aircraft X to stop. Aircraft X was just past the hold short line for runway 17L. I told Aircraft Y to go around. He said he'd like to land still. I approved a long landing.  During this time my supervisor started yelling at me asking if I told him to stop. I thought I had and I told him so. He then asked if I got the readback and I wasn't sure. The supervisor started yelling more and making me very nervous. He was saying that I needed to treat the stop instructions like they were hold short instructions and that I am required to get the read back. I had also been working with shorter breaks and with longer times on position to try to allow fellow controllers to make it to a meeting.I think the fact that we are telling pilots to do something they are already required to do to insure safety is a good thing. However if there is more imminent situation that should be taken care of first. I also think that the supervisor who was plugged in and listening should've been more aware.
DWH Tower controller becomes confused when he doesn't follow facility procedure of telling landing aircraft to turn left and stop. Front Line Manager (FLM) yells at controller and distracts him from remembering if he told the aircraft to stop. Aircraft passes a hold short line becoming a conflict with an arrival to another runway.