That route from Iran to Syria is about 23,300 kilometers (14,500 miles), compared with just 6,600 kilometers via the Red Sea and Suez Canal. A ship the size of the Grace 1, known as a Very Large Crude Carrier, or VLCC, can’t pass through the canal fully loaded. The shorter route would require it to discharge half its cargo, load it on to a smaller ship or send the oil through the Sumed Pipeline, and pick it up again in the Mediterranean.
Iran can’t pump oil through the pipeline, which spans Egypt from the Red Sea to the Mediterranean, because the link is owned by companies from Egypt, Saudi Arabia, the United Arab Emirates, Kuwait and Qatar. The pipeline’s owners have not permitted the transit of Iranian crude since August 2012.