“Iran’s oil tankers are starting to disappear from global satellite tracking systems with just under six weeks to go until U.S. sanctions are due to hit the country’s exports, making it harder to keep track of the nation’s sales. No signals have been received by shore stations or satellites from 10 of the Persian Gulf nation’s crude oil supertankers for at least a week, according to tanker tracking data compiled by Bloomberg. The most likely explanation is that the vessels’ transponders have been switched off, making it more difficult to track the their movements.”
Source: Iranian Oil Tankers Go Dark With 1 1/2 Months to Go to Sanctions – Bloomberg
