Plans by the German operator of a portion of the Venezuelan state oil company’s tanker fleet to return 10 vessels because of unpaid fees caused the maritime unit of the state firm, PDVSA, on Tuesday to declare a maritime emergency, according to a document from the state-run firm and sources. PDVSA’s weak finances, the result of mismanagement, a sharp decline in oil output and U.S. sanctions designed to oust President Nicolas Maduro, have prompted dozens of suppliers and partners to stop working for the company. The United States and more three dozen other countries have thrown their support behind an interim government being formed by the country’s congress chief, Juan Guaido. PDVSA’s maritime arm, PDV Marina, lacks about 160 people, including captains, […]