单项选择题

The Vessel Bridge-to-Bridge Radiotelephone Act applies ……

The Vessel Bridge-to-Bridge Radiotelephone Act applies to（）.

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

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单项选择题The unit of duration of a dash in Morse Code is（）.

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

单项选择题The range of a SSB transmission is MOST affected by（）.

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

单项选择题The light rhythm of Morse (A) is shown on（）.

A.preferred-channel buoys
B.starboard- or port-side buoys
C.special marks
D.safe water buoys

单项选择题The following（）is a standard phrase.

A.You may enter fairway
B.You should enter fairway
C.ANSWER. It is permitted to enter fairway
D.You could enter fairway

单项选择题The following（）is a standard phrase.

A.I may enter fairway
B.I might enter fairway
C.INTENTION. I will enter fairway
D.I will probably enter fairway