The British-flagged Stena Impero tanker was released Friday after more than two months of being moored outside Iran's Bandar Abbas port.
Stena Impero was seized in July by Iran in the Strait of Hormuz for alleged marine violations two weeks after British naval forces detained an Iranian tanker off the territory of Gibraltar.
"The ship is on the move," Erik Hanell, the chief executive of the ship's owner, Sweden's Stena Bulk, told Reuters in a text message. "We will comment further when the ship reaches international waters."
According to Refinitiv tracking data, the vessel is heading for Dubai's Port Rashid in the United Arab Emirates. The automatic identification system, an automated tracking system that uses transponders on the ship, indicates the vessel is "underway using the engine," traveling at 12 knots, and about 155 miles from Port Rashid.