A vessel may use any sound or light signals to attract the attention of another vessel as long as ______.A.white lights are not usedB.red and green lights are not usedC.the signal cannot be mistaken for a signal authorized by the RulesD.the vessel signals

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

in distress

approaching a bend in the channel

operating astern propulsion

intending to overtake another vessel

white

green

red

yellow

stop engines

hold course and speed

alter course to port

sound the danger signal

When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signal

Only the stand-on vessel can sound the danger signal

Distress signals may be used in place of the danger signal

The danger signal consists of 4 or more short blasts of the whistle

red star shell

searchlight

burning barrel

orange smoke signal

Both towheads will tend to drift apart，and the overtaking vessel will be slowed down

Both towheads will tend to drift together，and the overtaking vessel will be slowed down

Both towheads will tend to drift apart，and the overtaken vessel will be slowed down

Both towheads will tend to drift together，and the overtaken vessel will be slowed down

AIS may be used to make passing arrangements via ship-to-ship text messaging thus relieving a vessel operator from sounding whistle signals or making contact via radiotelephone

AIS may be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is still required to sound whistle signals unless the arrangement is made via radiotelephone

AIS cannot be used to make passing arrangements because the system does not have the ability to communicate from ship-to-ship in this manner

AIS cannot be used to make passing arrangements because the use of the ship-to-ship text messaging feature in this way is prohibited

aground

at anchor

not under command

being towed

A fully loaded vessel will be slower to respond to the engines

A fully loaded vessel will maintain her headway further

A light vessel will be more affected by the wind

A light vessel lose more rudder effect in shallow water

the gun is being used to sound passing signals

the vessel is in distress

all vessels are to clear the area

all is clear and it is safe to pass

The vessel must carry only the lights that comply with the rules; the others may be omitted

The vessel's lights must comply as closely as possible，as determined by her government

The vessel must be altered to permit full compliance with the rules

An all-round light should be substituted for the after masthead light and the stern light

white lights are not used

red and green lights are not used

the signal cannot be mistaken for a signal authorized by the Rules

the vessel signals such intentions over the radiotelephone

crew was trying to get warm

vessel required immediate assistance

vessel was attempting to attract the attention of a pilot boat

vessel was being illuminated for identification by aircraft

stand-on vessel and would sound two short blasts

give-way vessel and would sound no whistle signal

stand-on vessel and would sound no whistle signal

give-way vessel and would sound two prolonged blasts followed by two short blasts

A flashing amber light

A fixed red light

A white flag raised and lowered vertically

A flashing white light

Your vessel is obligated to stay out of the way

The other vessel must give way，since your vessel is stopped

You should be showing the lights or shapes for a vessel not under command

You should be showing the lights or shapes for a vessel restricted in her ability to maneuver

only if she is towing astern

only if the tow exceeds 200 meters

at any time when towing

if the towing vessel is part of a composite unit

privileged vessel and would sound two short blasts

burdened vessel and would sound two prolonged blasts followed by two short blasts

burdened vessel and would sound no whistle signal

privileged vessel and would sound no whistle signal

be accompanied by sound signals

not result in another close quarters situation

include a speed change

All of the above

one sidelight and the masthead light are visible

the vessels will pass closer than half a mile

both vessels sound one prolonged blast

both sidelights and masthead light(s) are visible