单项选择题
A.masters
B.chief engineers
C.crew
D.all personnel
单项选择题 According to Maritime Labour Convention, 2006, the minimum age at the time of the initial entry into force of this Convention is 16 years Night work of seafarers under the age of （）shall be prohibited.
单项选择题 According to Maritime Labour Convention, 2006, The minimum age at the time of the initial entry into force of this Convention is （）years.
单项选择题 According to Maritime Labour Convention, 2006, the maximum hours of work shall not exceed（）