Tanker sank after collision with another tanker, 4 missing, East China sea
Product tanker ZI YUN 1 collided with tanker GUOLIANG 399 off Zhoushan, Ningbo area, East China sea, at around 1830 LT Nov 22. ZI YUN 1 was overtaking GUOLIANG 399 when collision occurred. GUOLIANG 399 sank, there were 8 crew on board, 4 rescued, 4 are missing. ZI YUN 1 was in ballast, no information on GUOLIANG 399 cargo, if any. SAR and anti pollution operations under way.