更多"At 0900，you take the following rada"的相关试题:
[单项选择]When navigating in thick fog with the radar on，you should（）.
A. station the look-out in the wheelhouse to keep a continuous watch on the radar
B. secure the sounding of fog signals until a vessel closes within five miles
C. station a look-out as low down and far forward as possible
D. keep the radar on the shortest available range for early detection of approaching vessels
[单项选择]While on watch，you notice that the air temperature is dropping and is approaching the dew point.Which type of weather should be forecasted（）.
A. Hail
B. Heavy rain
C. Sleet
D. Fog
[单项选择]The officer of the watch should use radar when appropriate and at all times in（）waters.
A. congesting
B. congested
C. congestion
D. congest
[单项选择]I have（）you on my radar.
A. seen
B. sighted
C. watched
D. located
[单项选择]Would you please（）on the radar?
A. switch
B. to switch
C. switched
D. will switch
[单项选择]I can not（）you on my radar.
A. locate
B. look for
C. watch
D. look out
[单项选择]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
[单项选择]You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）
A. Starting with a dash and extending radially outward from the target
B. As a broken line from center of PPI to the target
C. Starting with a dot and extending radially inward from the target
D. Starting with a dash and extending to the right of the target
[单项选择]Your radar displays your ship off center．As you proceed on your course， your ship’s marker moves on the PPI scope while echoes from land masses remain stationary.What is this display called（）.
A. Off center
B. True motion
C. Stabilized
D. Head up
[单项选择]You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later，the contact is 8 miles directly astern of you. What is the estimated speed of the contact? （）
A. Dead in the water
B. 1 knot
C. 10 knots
D. 15 knots
[单项选择]You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.
A. Relative
B. TRUE
C. Compass
D. Magnetic
[单项选择]While on watch at sea you must maintain a proper lookout at all times. On a 700-foot cargo vessel being hand-steered during daylight hours in good visibility and clear of any navigational hazards，the lookout may be（）.
A. the helmsman
B. the mate on watch
C. Either A or B
D. Neither A nor B
[单项选择]The second officer will take（）the watch soon.
A. on
B. under
C. off
D. over
[单项选择]I hope you don’t mind（）the radar for us in a short time.
A. repair
B. repaired
C. repairing
D. to repair
