The Baztab website quotes the acting commander of the Revolutionary Guard's land forces as saying that Iran has unmanned aircraft that can fly long distances and launch attacks on American warships.

The commander reportedly said this would make the Americans leave the region in shame.

He added Iran had all US activity, including the slightest changes of the enemy, under constant surveillance.

And the website also quoted the commander claiming that Iran had managed to put the logo of the Revolutionary Guards on the side of an American warship in the Gulf to demonstrate how insecure they were in this region.

There is no independent confirmation of these Iranian assertions, but they show how Tehran is trying to counter what it says is the psychological warfare of the Americans with claims of military superiority.

Every few weeks, there are new Iranian war games and state television shows pictures of fresh military hardware like missiles and torpedoes being tested.