Keep the NO1（）(浮标) on the port side!

单项选择题----How answers? -----（）(舵很灵) ！

A. No steerage
B. Answers back
C. Answers all right
D. No answer

单项选择题How answers? -----（）(舵反转) ！

A. No steerage
B. Answers back
C. Answers all right
D. No answer

单项选择题This is a （）(罗兰).

A. compass
B. direction finder
C. loran
D. sextant

单项选择题Officers use sextants to observe （）.

A. stars
B. celestial bodies
C. the sun
D. the moon

单项选择题The telegraph is the（）(设备)that connects the engine room and the bridge.

A.gear
B.equipment
C.engine
D.sextant