The US provided Britain with 200
Sidewinder missiles for use by the Harrier jets,
[197][198] eight Stinger surface-to-air missile systems,
Harpoon anti-ship missiles and mortar bombs.
[199] On Ascension Island, the underground fuel tanks were empty when the British Task Force arrived in mid-April 1982 and the leading assault ship,
HMS Fearless, did not have enough fuel to dock when it arrived off the island. The United States diverted a
supertanker to replenish both the fuel tanks of ships at anchor there and the storage tanks on the island with approximately 2,000,000 US gallons (7,600,000 L; 1,700,000 imp gal) of fuel.
[200] The Pentagon further committed to providing additional support in the event that the war dragged on into the Southern Hemisphere's winter. In that scenario, the US committed tanker aircraft to support Royal Air Force missions in Europe, releasing RAF aircraft to support operations over the Falklands.
[201]
The United States allowed the United Kingdom to use American communication satellites for secure communications between submarines in the Southern Ocean and Naval HQ in Britain. The US also passed on satellite imagery (which it publicly denied
[202]) and weather forecast data to the British Fleet.
[203]
US President Ronald Reagan approved the Royal Navy's request to borrow a
Sea Harrier-capable
Iwo Jima-class amphibious assault ship (the US Navy had earmarked
USS Guam (LPH-9) for this
[204]) in the event a British aircraft carrier was lost. The
US Navy developed a plan to help the British man the ship with American
military contractors, who would likely be retired sailors with knowledge of the ship's systems.