The Osan uses Terminal Control Area is an American run TCA that is composed of 2 joint South Korean-American air bases (RKSW and RKSO) and 1 Army Air Field (RKSG). Phraseology is all FAA standard phraseology and per the US Order 7110.65. Please see the [http://www.ivaous.org/fdr/References/Standard%20Phraseology%20Guide.pdf XA Division's Guide to FAA Phraseology] to control this area. Please note that altimeter settingsare given in inches (Altimeter 2992) and are given in the IVAC METAR and ATIS, so no conversion is necessary.
Under construction== Terminal Control Area ==[[File:Osan TCA.png|400px]] === Airports Within the TCA ===* [[RKSO Osan AB]]* [[RKSG Desiderio AAF]]* [[RKSW Suwon AB]] == ATC Positions =={| class="wikitable" |-!Sector Position!!Callsign!!Frequency!!Coverage Area|-|Osan Approach/Departure||RKSO_APP||127.900||Covers entire TCA and airports when other positions offline|-|Osan Tower||RKSO_TWR||122.100||Tower controller at RKSO|-|Osan Ground||RKSO_GND||132.450||Ground controller at RKSO|-|Osan Clearance||RKSO_DEL||127.300||Clearance Delivery at RKSO|-|Desiderio Tower||RKSG_TWR||122.500||Tower controller at RKSG|-|Desiderio Ground||RKSG_GND||119.500||Ground controller at RKSG|-|Suwon Tower||RKSW_TWR||126.200||Tower controller at RKSW|-|}