Iran has moved a mock-up U.S. aircraft carrier to the strategic Strait of Hormuz, satellite images show, suggesting it will use the look-alike vessel for target practice in war games in a Gulf shipping channel vital to world oil exports.

The use of dummy American warships has become an occasional feature of training by Iran's Revolutionary Guard and its naval forces, including in 2015 when Iranian missiles hit a mock-up resembling a Nimitz-class aircraft carrier.

Tehran, which opposes the presence of U.S. and Western navies in the Gulf, frequently holds naval war games in the strategic Strait, the conduit for some 30 percent of all crude and other oil liquids traded by sea.