Between Port of Shanghai Wu Songkou and the round sand light ship collides the accident to be many, in 2004 N turn with S turn collides a document to have certain typical nature.

• 上海港吴淞口和圆圆沙灯船之间碰撞事故较多,2004年N轮与S轮碰撞一案具有一定的典型性。