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Air support, of course, was closely related to naval gunfire planning. After the arrival of CG 1st MAW and his staff at Tokyo on 3 September, part of the group proceeded at once to Itami Air Force Base while General Harris and selected staff members remained at Tokyo for planning conferences.

  Air support planning for Inch'ŏn was based on the decision that the sky over the objective area was to be divided between the organic air units of JTF–7 and X Corps.

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  JTF–7 counted on its fast carrier task force, TF–77, to gain air supremacy and furnish deep support and interdiction strikes. Close support for the landing was to be provided by the two squadrons of TG–90.5, on board the CVEs USS Sicily (CVE-118) and USS Badoeng Strait (CVE-116), which had been the main air components of MAG–33 in support of the 1st Marine Provisional Brigade. In addition, the Attack Force commander could also call upon the aircraft of TF–77 for close support.

  Organic air support for X Corps was to be the mission of the Tactical Air Control set up under the operational control of the corps commander and the direct command of General Cushman. The inspiration for this organization came from Marine officers on the staff of X Corps. Their suggestions were accepted by General Almond, who used his authority as FECOM chief of staff to put the idea into effect.

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  MAG–33 was designated by General Harris from the Forward Echelon, 1st MAW, to serve as TAC X Corps, with VMFs 212 and 312 in addition to VMF(N)–542 and the rear echelon of VMF(N)–513. These units were not to be assigned, however, until X Corps assumed control of operations in the objective area, whereupon they would be based at Kimp'o Airfield. Meanwhile, they remained under the administrative control of ComNavFE and MAG–12, with headquarters at the Itami AFB in Japan. The two Marine carrier-based squadrons and the forward echelon of VMF(N)–513, having come out to Korea in August as units of MAG–33, continued to be assigned temporarily to that group for administrative purposes.[22]