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单选题
A flashing red light displayed at a single lock means that the lock（）.
A
is ready to use but vessels must stand clear
B
is ready to use and vessels may approach
C
cannot be made ready immediately and vessels shall stand clear
D
cannot be made ready immediately but vessels may approach
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更多 “单选题A flashing red light displayed at a single lock means that the lock（）.A is ready to use but vessels must stand clearB is ready to use and vessels may approachC cannot be made ready immediately and vessels shall stand clearD cannot be made ready immediately but vessels may approach” 相关考题
考题
On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector ______.A.indicates the limits of the navigable channelB.indicates a danger areaC.is used to identify the characteristics of the lightD.serves no significant purpose
考题
Restricted areas at locks and dams are indicated by ______.A.flashing red lights upstream and fixed red lights downstremB.yellow unlighted buoysC.signs and / or flashing red lightsD.red daymarks upstream and green daymarks downstream
考题
A list signal of one white light indicates that the vessel is ______.A.on an even keelB.listing about 1° to the side the light is displayed onC.listing over 5°With the light displayed on the high sideD.listing，and the chutes should be directed to the side where the light is displayed
考题
An anchored vessel on pilotage duty must show which light(s) at night?A.A sternlight onlyB.Anchor lights onlyC.A white light over a red light onlyD.A white light over a red light and anchor lights
考题
A vessel trawling will display a ______.A.red light over a white lightB.green light over a white lightC.yellow light over a red lightD.white light over a green light
考题
The Coordinator Surface Search（CSS）in a SAR situation should display by night ______．A.Deck lights forward and aftB.A white light over two red lightsC.A red light，white light，and blue light in a vertical lineD.A distinctive signal promulgated by the CSS
考题
A buoy having red and green horizontal bands would have a light characteristic of ______.A.group occultingB.composite group flashingC.Morse letter AD.quick flashing
考题
The question "How fast did he drive when he ran the red light?" __________ "He ran the red light".
A．presupposes
B．entails
C．contradicts
D．includes
考题
单选题When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.A
a junction with the preferred channel to the leftB
a sharp turn in the channel to the rightC
the starboard side of the channelD
a wreck to be left on the vessel's port side
考题
单选题A preferred-channel buoy will show a（）.A
white light whose characteristic is Morse (A)B
group-occulting white lightC
composite group-flashing (2 + 1) white lightD
composite group-flashing (2 + 1) red or green light
考题
单选题The Coordinator Surface Search（CSS）in a SAR situation should display by night（）.A
Deck lights forward and aftB
A white light over two red lightsC
A red light，white light，and blue light in a vertical lineD
A distinctive signal promulgated by the CSS
考题
单选题A flashing red light displayed at a single lock means that the lock（）.A
is ready to use but vessels must stand clearB
is ready to use and vessels may approachC
cannot be made ready immediately and vessels shall stand clearD
cannot be made ready immediately but vessels may approach
考题
单选题A towing light is a yellow light having the same characteristics as a(n)（）A
special flashing lightB
anchor lightC
sternlightD
masthead light
考题
单选题A vessel engaged in trawling will show identification lights of（）.A
a red light over a white lightB
a white light over a red lightC
a green light over a white lightD
two red lights in a vertical line
考题
单选题As you approach mile 659.4 AHP，you see on the right descending bank a flashing green light. This light marks（）.A
a lock that is openB
a sunken bargeC
a dolphin，water intake and dischargeD
the end of a wharf
考题
单选题A flashing green light displayed at a single lock means that the lock is（）.A
ready for entranceB
ready for entrance，but gates cannot be closed completelyC
being made ready for entranceD
not ready for entrance
考题
单选题A bridge over a navigable waterway is being repaired. There is a traveller platform under the bridge’s deck that significantly reduces the vertical clearance. If required by the CG district commander，how will this be indicated at night?（）A
Illumination by flood lightsB
A quick flashing red light at each lower cornerC
A strobe light visible both up and downstreamD
Fixed amber lights under the extreme outer edges of the traveller
考题
单选题A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（）A
A flashing amber lightB
A fixed red lightC
A white flag raised and lowered verticallyD
A flashing white light
考题
单选题A buoy having red and green horizontal bands would have a light characteristic of（）.A
group occultingB
composite group flashingC
Morse letter AD
quick flashing
考题
单选题A message by flashing light consists of the call，the identity，the ending，and the（）.A
replyB
textC
timeD
answer
考题
单选题An anchored vessel on pilotage duty must show which light(s) at night? （）A
A sternlight onlyB
Anchor lights onlyC
A white light over a red light onlyD
A white light over a red light and anchor lights
考题
单选题You are underway and pass by a lighthouse. Its light，which was white since you first sighted it，changes to red. This means（）.A
the light is characterized as alternately flashingB
the lighthouse has lost power and has switched to emergency lightingC
it is the identifying light characteristic of the lighthouseD
you have entered an area of shoal water or other hazard
考题
单选题A list signal of one white light indicates that the vessel is （）.A
on an even keelB
listing about 1° to the side the light is displayed onC
listing over 5° With the light displayed on the high sideD
listing，and the chutes should be directed to the side where the light is displayed
考题
单选题You have berthed in a area with other tank vessels. What signal is displayed by a vessel to indicate it is transferring flammable or combustible liquid cargo?（）.A
A flashing yellow lightB
A red light visible all around the horizonC
A green light visible all around the horizonD
An illuminated red and yellow caution flag
考题
单选题How is a safe water mark，that can be passed close aboard on either side，painted and lighted?（）A
Black and white stripes with an interrupted quick flashing lightB
Black and red stripes with a Morse (A) lightC
Black and red stripes with an interrupted quick flashing lightD
Red and white stripes with a Morse (A) light
考题
单选题On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.A
Indicates the limits of the navigable channelB
Indicates a danger areaC
Is used to identify the characteristics of the lightD
Serves no significant purpose
考题
单选题Restricted areas at locks and dams are indicated by（）.A
flashing red lights upstream and fixed red lights downstreamB
yellow unlighted buoysC
signs and/or flashing red lightsD
red daymarks upstream and green daymarks downstream
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