A.A 100 GT towboat，24 feet in length
B.A 90-foot towboat tied to the pier
C.A 60-foot towboat towing by pushing ahead
D.A 400 GT towboat anchored
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A.every towing vessel of 16 feet or over in length while navigating
B.every vessel of 50 GT and upward，carrying one or more persons for hire
C.all aircraft operating on the water
D.every power-driven vessel of 20 meters and upward while navigating
A.one and one-half times the length of a dot
B.twice the length of a dot
C.three times the length of a dot
D.four times the length of a dot
A.atmospheric noise and radiated power
B.the frequency band selected and time of day or night
C.interference and position of the moon
D.radiated power and nearness to shore
A.preferred-channel buoys
B.starboard- or port-side buoys
C.special marks
D.safe water buoys
A.You may enter fairway
B.You should enter fairway
C.ANSWER. It is permitted to enter fairway
D.You could enter fairway
最新試題
When may the automatic identification system (AIS) be switched off? （）
Which of the following statements is TRUE regarding automatic identification systems (AIS)? （）
Which of the following statements is TRUE regarding automatic identification systems (AIS) ? （）
Automatic identification systems (AIS) are required to（）.
When communicating on the radiotelephone using plain English，what procedure word indicates the end of my transmission and that a response is necessary? （）
That ship arrived there（）6 p.m.yesterday.
The Vessel Bridge-to-Bridge Radiotelephone Act applies to（）.
Take tug’s towing line to（）.
Electrical wiring on all T-Boats must be（）.
Tell me（），please.