I am in doubt as to your actions
My engines are full speed astern
I desire to overtake you
I am operating astern propulsion
第1题：
A light used to signal passing intentions must be an ______.
A.all-round yellow light only
B.all-round white light only
C.all-round blue light only
D.alternating red and yellow light
第2题：
A vessel is carrying three lights in a vertical line. The highest and lowest of these are red and the middle light is white. Which statement is always TRUE?
A.During the day，she would display three balls in a vertical line
B.If making way，she would show masthead lights at night
C.If at anchor，she need not show anchor lights while displaying identifying lights
D.Her fog signal would consist of a rapid ringing of a bell for five seconds every minute
第3题：
A. fiber dispersion
B. signal attenuation
C. transmitter power
D. amplifier bandwidth
E. receiver dispersion tolerance
第4题：
What are three factors that limit the maximum distance of an amplified optical signal without regeneration？ （）
第5题：
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? （）(Choose three.)
第6题：
A list signal of one white light indicates that the vessel is ______.
A.on an even keel
B.listing about 1° to the side the light is displayed on
C.listing over 5°With the light displayed on the high side
D.listing，and the chutes should be directed to the side where the light is displayed
第7题：
A light siglinal consisting of three flashes means ______.
A.I an in doubt as to your actions
B.My engines are full speed astern
C.I desire to overtake you
D.I am operating astern propulsion
第8题：
A light signal consisting of three flashes means ______.
A.I am in doubt as to your actions
B.My engines are full speed astern
C.I desire to overtake you
D.I am operating astern propulsion
第9题：
There is a （）(桅灯) on the mast.
第10题：
桅灯（）