Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3.5
Confusion; Situational Awareness; Training / Qualification; Communication Breakdown
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Human Factors
Aircraft X was on a SCT North Sector data block and was on a visual approach while Aircraft Y was on SCT East Sector data block on an RNAV approach; SCT did not coordinate with MYF Tower to provide visual separation with these two aircraft. I was training a student on Local.  We were already in communication with Aircraft Y when Aircraft X checked in; and I asked our Local Assist if SCT had coordinated with us to provide visual separation. Local Assist responded negative. I immediately notified the OS [Operational Supervisor] of the situation and told him there was going to be a LoSS [Loss of Standard Separation] very soon. Aircraft X made it to the Runway 28R final approach course about 1 mile in front of Aircraft Y at approximately same altitude. After PRB [Position Relief Briefing]; I asked the OS [Operational Supervisor] if he had the info he needed for the report. He seemed reluctant to file a report; and I was interviewed by the ATM [Air Traffic Manager] shortly after.  The ATM [Air Traffic Manager] stated that since I had observed the aircraft [and] was providing visual separation; no loss had occurred. I disagree with this assessment since it is SCT's job to provide separation between IFR aircraft and they did not properly apply visual separation. The MYF ATM [Air Traffic Manager] directed the OS not to file a report.North and East sectors need to improve their required coordination.
MYF Tower Controller reported an unsafe operation by the overlying TRACON not asking Tower to provide visual separation.