The International Salvage Union (ISU) has welcomed the release from detention in Pakistan of Tsavliris Salvage Master Nicolas Pappas and members of the crew of the tanker Tasman Spirit , which had run aground and broken up in the approaches to the Port of Karachi . The ISU called upon Spain to follow the example set by Pakistan and repatriate Captain Mangouras, Master of the tanker Prestige , who remains unable to leave Spain more than two years after the sinking of his vessel off the Spanish coast.