单项选择题
In the voyage, duty officer should inform （） situation to the duty engineer immediately.
A.in/ut port B.passing through big bridge C.big steering angle for direction changing D.in/out port and passing through big bridge
单项选择题 Statutory survey could be divided into two kinds, they are （）
单项选择题 （）is not the main function of CCS.
单项选择题 If some surveys refer to statutory survey and ship classification survey but occur temporarily, we call them （）
