The 139-meter car carrier ran aground last Monday, July 23, off Loftahammar, Sweden, causing extensive damage to the hull plates and water ingress. Before salvors could address oil contained in breached tanks, the ship floated free on its last weekend, causing oil to leak from the ship.
Salvors called for an emergency tow of the vessel on Tuesday, fearing the condition of the ship would worsen if it were left in place.
The Coast Guard reported Wednesday a minor oil leak of about 100 liters occurred during the tow, but most of what was released was captured by a trailing skimming vessel.
The ship was initially reported to be carrying approximately 400,000 liters of fuel oil and lube, the extent of which was released not yet determined.
The Panama-flagged Makassar Highway is operated by the European subsidiary of K-Line, named K-Line European Sea Highway Services.
The Coast Guard said that an investigation into the cause of the initial grounding is still on-going.
Oil pollution prevention will containue while the ship is in port.