The most powerful U.S. warship ever seen in the Persian Gulf made its debut on Saturday after passing safely through the Strait of Hormuz and Iran's "Silkworm envelope."

Tension ran fairly high among the 385-man crew of the USS Vincennes during its nighttime run up the narrow strait. It passed about four miles from a Panamanian-flagged tanker, still on fire some 20 hours after being attacked by Iranian speedboats.Salvage tugboats were pouring water on the ship, which was listing and appeared to have suffered severe fire damage to its super-structure.