MARITIME TRAFFIC CONTROL SYSTEM. Port Captain Office in Quintero operates a VTS, which provides information service to the navigation (INS). The vessels entering the zone of responsibility of the Quintero VTS, must communicate with Quintero Radio CBV-21 on channel 16, and indicate the station name, call sign, ETA at the Pilot Station. See procedure VTS in Pub. 3008 SHOA. Radioayudas a la Navegacion (Radio navigational aids).