A rapid ringing of a bell for 5 seconds every two minutes
A whistle signal of one short，one prolonged，and one short blast
A prolonged blast of the whistle at intervals not to exceed one minute
A rapid ringing of a bell for 5 seconds，preceded and followed by three separate and distinct strokes on the bell
第1题：
A vessel not under command sounds the same fog signal as a vessel ______.
A.engaged in towing
B.constrained by her draft
C.under sail
D.All of the above
第2题：
Continuous sounding of a fog whistle by a vessel is a signal ______.
A.that the vessel is anchored
B.to request the draw span of a bridge to be opened
C.of distress
D.that the vessel is broken down and drifting
第3题：
You are on international waters during a heavy rainstorm and hear a vessel sounding a fog signal of one prolonged blast followed by two short blasts． Which of the following could it be？Ⅰ．A vessel laying submarine cable making way．Ⅱ．A pilot vessel on station at anchor．
A.Ⅰ only
B.Ⅱ only
C.Either Ⅰ or Ⅱ
D.Neither Ⅰ nor Ⅱ
第4题：
When at anchor，the pilot vessel is only required to sound anchor signals
The identification signal must be sounded any time the pilot vessel is underway
The pilot vessel may only sound the identity signal when making way
All of the above
第5题：
In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should ______.
A.stop your engines
B.sound the danger signal at two-minute intervals
C.hold course and speed until the other vessel is sighted
D.take avoiding action as soon as possible
第6题：
Concerning the identification signal for a pilot vessel, in fog, which statement is TRUE?___.
A.When at anchor, the pilot vessel is only required to sound anchor signals
B.The identification signal must be sounded any time the pilot vessel is underway
C.The pilot vessel may only sound the identity signal when making way
D.All of the above
第7题：
If practical, when shall a manned vessel being towed sound her fog signal?______.
A.Immediately before the towing vessel sounds hers
B.Immediately after the towing vessel sounds hers.
C.As close to the mid-cycle of the towing vessel’s signals as possible
D.At any time as long as the interval is correct
第8题：
On the high seas，a fog signal consisting of one prolonged blast followed by four short blasts would indicate the presence of a ______.
A.vessel being towed
B.fishing vessel engaged in trawling
C.vessel at anchor warning you of her location
D.power-driven pilot vessel on station underway
第9题：
One blast at one-minute intervals
One blast at two-minute intervals
Two blasts at one-minute intervals
One prolonged and two short blasts at two-minute intervals
第10题：
towing
constrained by her draft
under sail
All of the above