Port officials are trying to determine what to do with several Iraqi crewmen aboard an Arab oil tanker anchored in the Delaware Bay. The Iraqis are part of the crew of the Aldawha, which is registered in Qatar and owned by the Arab Maritime Petroleum Co. Details are sketchy but Senior Chief Tod Lyons of the Coast Guard's Fifth District press office in Portsmouth, Va., confirmed an investigation was underway, but said no decision had been made about what to do with the Iraqis.