I saw and photographed the 42172 Gross Ton, Oil Products Tanker Energy Challenger on only one occasion which was in November 2012 when she was tied up at one of the Esso Bertrhs of the Fawley Refinery Southampton. At the time I was on board the Red Funnel car and passenger ferry Red eagle that was motoring in Southampton Water heading for East Cowes Isle of Wight. Energy Challenger was built in South Korea in 2005 and when I saw her I believe that she was Registered in the United Kingdom. An Internet search using her IMO number (IMO 9288265) carried out in October 2022, indicates that she is now called Blue Nil and is Registered in Panama.