Flight Crew Air Transport Pilot (ATP)
Distraction
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Other / Unknown
Air Traffic Control Issued New Clearance
Airspace Structure; Human Factors; Procedure
While on LUCKI 4 Arrival to SAN; we were distracted by an odd aircraft close to our track. It looked like a large drone. We were distracted discussing this aircraft and possibly missed something. Soon after ATC made an odd query as to our position as if we were tracking incorrectly; asked if we had the field in sight. I replied that we did and ATC cleared us for a visual approach. After landing they gave a phone number to call for possible deviation. SoCal implied we were off course/asked if field in sight/cleared us for a visual approach. I am unsure what was wrong. Need better communication with ATC.
First Officer reported sighting a drone while on initial approach to SAN; which caused a distraction and possible track deviation.