Automatic identification system data for the Iran-connected VLCC at the centre of east-west geopolitical turmoil briefly went dark, following the US cautioning Mediterranean ports against aiding the ship.

The 300,600-dwt Adrian Darya 1 (built 1997), formerly the Grace 1, last reported a position Tuesday at 7:17 a.m. (617 GMT) while sailing in the about 58 miles north of Oran, Algeria, according to data from MarineTraffic.