Product tanker POR ANDAMAN 2 sank in the evening Jan 22 in Gulf of Siam 62 nm north of Koh Samuiisland, Thailand, cause unclear. 6 crew rescued, all are safe. Tanker has some 450-500 tons of fuel on board, oil leak occurred. Stain some 10 kilometers long, up to 200 meters wide, reported drifting in northern direction, but it’s a thin oil film, expected to dissolve naturally. Thai Navy is monitoring stain drift, and situation in wreckage are.