[badhat17]

Decided to do some more research into the 'Hercules' incident to satisfy my curiosity about the outcome and came across this after several hours searching.

CHIEF JUSTICE REHNQUIST delivered the opinion of the Court.

Two Liberian corporations sued the Argentine Republic in a United States District Court to recover damages for a tort allegedly committed by its armed forces on the high seas in violation of international law. We hold that the District Court correctly dismissed the action, because the Foreign Sovereign Immunities Act of 1976 (FSIA), 28 U.S.C. 1330 et seq., does not authorize jurisdiction over a foreign state in this situation.

Respondents alleged the following facts in their complaints. Respondent United Carriers, Inc., a Liberian corporation, chartered one of its oil tankers, the Hercules, to respondent Amerada Hess Shipping Corporation, also a Liberian corporation. The contract was executed in New York City. Amerada Hess used the Hercules to transport crude oil from the southern terminus of the Trans-Alaska Pipeline in Valdez, Alaska, around Cape Horn in South America, to the Hess refinery in the United States Virgin Islands. On May 25, 1982, the Hercules began a return voyage, without cargo but fully fueled, from the Virgin Islands to Alaska. At that time, Great Britain and petitioner Argentine Republic were at war over an archipelago of some 200 islands - the Falkland Islands to the British, and the Islas Malvinas to the Argentineans - in the South Atlantic off the Argentine coast. On June 3, United States officials informed the two belligerents of the location of United States vessels and Liberian tankers owned by United States interests then traversing the South Atlantic, including the Hercules, to avoid any attacks on neutral shipping.

By June 8, 1982, after a stop in Brazil, the Hercules was in international waters about 600 nautical miles from Argentina and 500 miles from the Falklands; she was outside the "war zones" designated by Britain and Argentina. At 12:15 Greenwich mean time, the ship's master made a routine report by radio to Argentine officials, providing the ship's [488 U.S. 428, 432] name, international call sign, registry, position, course, speed, and voyage description. About 45 minutes later, an Argentine military aircraft began to circle the Hercules. The ship's master repeated his earlier message by radio to Argentine officials, who acknowledged receiving it. Six minutes later, without provocation, another Argentine military plane began to bomb the Hercules; the master immediately hoisted a white flag. A second bombing soon followed, and a third attack came about two hours later, when an Argentine jet struck the ship with an air-to-surface rocket. Disabled but not destroyed, the Hercules reversed course and sailed to Rio de Janeiro, the nearest safe port. At Rio de Janeiro, respondent United Carriers determined that the ship had suffered extensive deck and hull damage, and that an undetonated bomb remained lodged in her No. 2 tank. After an investigation by the Brazilian Navy, United Carriers decided that it would be too hazardous to remove the undetonated bomb, and on July 20, 1982, the Hercules was scuttled 250 miles off the Brazilian coast.

More at the following link but it's mostly legal jargon.

http://www.admiraltylawguide.com/supct/AmeradaHess.htm

One source gave the Hercules as being a 220,000 ton supertanker.