is ready to use but vessels must stand clear
is ready to use and vessels may approach
cannot be made ready immediately and vessels shall stand clear
cannot be made ready immediately but vessels may approach
第1题：
A list signal of one white light indicates that the vessel is ______.
A.on an even keel
B.listing about 1° to the side the light is displayed on
C.listing over 5°With the light displayed on the high side
D.listing，and the chutes should be directed to the side where the light is displayed
第2题：
A vessel trawling will display a ______.
A.red light over a white light
B.green light over a white light
C.yellow light over a red light
D.white light over a green light
第3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 channel
B.indicates a danger area
C.is used to identify the characteristics of the light
D.serves no significant purpose
第4题：
a junction with the preferred channel to the left
a sharp turn in the channel to the right
the starboard side of the channel
a wreck to be left on the vessel's port side
第5题：
A buoy having red and green horizontal bands would have a light characteristic of ______.
A.group occulting
B.composite group flashing
C.Morse letter A
D.quick flashing
第6题：
An anchored vessel on pilotage duty must show which light(s) at night?
A.A sternlight only
B.Anchor lights only
C.A white light over a red light only
D.A white light over a red light and anchor lights
第7题：
The Coordinator Surface Search（CSS）in a SAR situation should display by night ______．
A.Deck lights forward and aft
B.A white light over two red lights
C.A red light，white light，and blue light in a vertical line
D.A distinctive signal promulgated by the CSS
第8题：
Restricted areas at locks and dams are indicated by ______.
A.flashing red lights upstream and fixed red lights downstrem
B.yellow unlighted buoys
C.signs and / or flashing red lights
D.red daymarks upstream and green daymarks downstream
第9题：
第10题：
white light whose characteristic is Morse (A)
group-occulting white light
composite group-flashing (2 + 1) white light
composite group-flashing (2 + 1) red or green light