Medium Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Confusion; Distraction
Airspace Violation All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Requested ATC Assistance / Clarification
Aircraft; Human Factors
While on the visual approach into HOU on the ILS 4. The FO (First Officer) was Pilot Flying and while he was flying the approach I noticed what I thought were two birds just to the right of the aircraft at around 9 o'clock but outside the course. I made the FO aware of this and continued to keep scanning for more birds in the area since the first one I saw was well clear of our course. However at 2;300 ft. and 0.5NM past ELREN on the ILS 4 the two objects were actually drones that past off our right hand side that were the size of two big birds. I noticed the two were indeed drones because I saw the propellers on two of them and they had a shiny black finish on them. I also checked the TCAS to see if they were there; but it didn't show them on the screen. I relayed this information to HOU tower and told them what altitude and where they were. Upon landing and taxing off the runway and contacting ground; I was given a phone number to call the tower to give them more information on the description of the drones; and where I spotted them on the approach.My suggestion is to always keep scanning the area for any hazards while flying even if the TCAS system doesn't show anything in the area.
Air carrier flight crew noticed drone while on final approach to landing.