When must the Master of a vessel log the position of load line marks in relation to the surface of the water in the Official Logbook?（）
- AOnce a day
- BAt the change of every watch
- COnly when in fresh or brackish water
- DPrior to getting underway
问题
When must the Master of a vessel log t
参考解析：
分类：航海日志的填写题库
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