The Falklands War - Escalation of the Air War

The Falklands had only three airfields. The longest and only paved runway was at the capital, Stanley, and even that was too short to support fast jets (although an arrestor gear was fitted in April to support Skyhawks). Therefore, the Argentines were forced to launch their major strikes from the mainland, severely hampering their efforts at forward staging, combat air patrols and close air support over the islands. The effective loiter time of incoming Argentine aircraft was low, and they were later compelled to overfly British forces in any attempt to attack the islands.

The first major Argentine strike force comprised 36 aircraft (A-4 Skyhawks, IAI Daggers, English Electric Canberras, and Mirage III escorts), and was sent on 1 May, in the belief that the British invasion was imminent or landings had already taken place. Only a section of Grupo 6 (flying IAI Dagger aircraft) found ships, which were firing at Argentine defences near the islands. The Daggers managed to attack the ships and return safely. This greatly boosted morale of the Argentine pilots, who now knew they could survive an attack against modern warships, protected by radar ground clutter from the Islands and by using a late pop-up profile.

Meanwhile, other Argentine aircraft were intercepted by BAE Sea Harriers operating from HMS Invincible. A Dagger (piloted by Osvaldo Ardiles' cousin José) and a Canberra were shot down.

Combat broke out between Sea Harrier FRS Mk 1 fighters of No. 801 Naval Air Squadron and Mirage III fighters of Grupo 8. Both sides refused to fight at the other's best altitude, until two Mirages finally descended to engage. One was shot down by an AIM-9L Sidewinder air-to-air missile (AAM), while the other escaped but was damaged and without enough fuel to return to its mainland air base. The plane made for Stanley, where it fell victim to friendly fire from the Argentine defenders.

As a result of this experience, Argentine Air Force staff decided to employ A-4 Skyhawks and Daggers only as strike units, the Canberras only during the night, and Mirage IIIs (without air refuelling capability or any capable AAM) as decoys to lure away the British Sea Harriers. The decoying would be later extended with the formation of the Escuadrón Fénix, a squadron of civilian jets flying 24 hours-a-day simulating strike aircraft preparing to attack the fleet. On one of these flights, an Air Force Learjet was shot down, killing the squadron commander, Vice Commodore Rodolfo De La Colina, the highest-ranking Argentine officer to die in the war.

Stanley was used as an Argentine strong point throughout the conflict. Despite the Black Buck and Harrier raids on Stanley airfield (no fast jets were stationed there for air defence) and overnight shelling by detached ships, it was never out of action entirely. Stanley was defended by a mixture of surface-to-air missile (SAM) systems (Franco-German Roland and British Tigercat) and Swiss-built Oerlikon 35 mm twin anti-aircraft cannons. Lockheed Hercules transport night flights brought supplies, weapons, vehicles, and fuel, and airlifted out the wounded up until the end of the conflict.

The few Royal Navy Sea Harriers were considered too valuable by day to risk in night-time blockade operations, and their Blue Fox radar was not an effective look-down over land radar.

The only Argentine Hercules shot down by the British was lost on 1 June when TC-63 was intercepted by a Sea Harrier in daylight when it was searching for the British fleet north-east of the islands after the Argentine Navy retired its last SP-2H Neptune due to airframe attrition.

Various options to attack the home base of the five Argentine Etendards at Río Grande were examined and discounted (Operation Mikado), subsequently five Royal Navy submarines lined up, submerged, on the edge of Argentina's 12-nautical-mile (22 km; 14 mi) territorial limit to provide early warning of bombing raids on the British task force.