Because of the waterway’s immense importance and it’s proximity to Iran, the Strait of Hormuz is a common site of overt acts of aggression between the U.S. Navy and Iran’s Revolutionary Guard.

And indeed, as we often see Iran threaten to do to America’s real aircraft carriers, Iranian TV aired footage of commandos fast-roping onto the deck of the ship from helicopters, as well as fast attack boats swarming around the hulking structure. The spectacle was dubbed “Great Prophet 14,” and culminated with firing on the floating barge with a variety of missiles.

“We cannot speak to what Iran hopes to gain by building this mockup, or what tactical value they would hope to gain by using such a mock-up in a training or exercise scenario,” Cmdr. Rebecca Rebarich told The Associated Press. “We do not seek conflict, but remain ready to defend U.S. forces and interests from maritime threats in the region.”

It seems likely that, although Iran’s fake aircraft carrier is smaller than a real Nimitz-class vessel, it’s used both for training and propaganda. Because Iran’s leaders see the United States as their main opponent, the use of the carrier offers a chance to rehearse a great war with the United States without having to suffer the consequences of such a conflict. However, Iran may now be facing a different kind of negative consequence, with the mock carrier sinking in an area of the waterway that is not deep enough to allow ships to pass over the sunken mockup.

After the carrier remained somewhat visible for a while, it has since submerged beneath the waters of the Bandar Abbas harbor — which is only 45 feet deep. That means large ships cannot pass over where the carrier came to rest without risking serious damage.

In other words, in Iran’s fervor to show America how effectively the nation’s military could defend Iran’s territorial waters, it inadvertently made it significantly less safe for them to operate in those same waters.

Iran will almost certainly need to attempt to salvage the vessel; not just for the sake of another round of target practice, but because its presence will pose a significant risk to any large ships trying to travel into or out of the harbor. It isn’t currently clear if Iran even has the means to mount such a salvage effort, however. So, for now, Iran’s fake American aircraft carrier may pose a more direct threat to Iranian interests than the real Nimitz carriers America often sails through the nearby Strait of Hormuz.

This is far from the first big blunder for Iran on the world’s stage this year. In May, the Iranian military unintentionally fired an anti-ship missile at one of its own vessels, killing 19, and in January, Iranian air defenses accidentally shot down a Ukrainian airline, killing all 176 onboard.