更多"In fog you observe your radar and d"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]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]If your vessel is underway in fog and you hear one prolonged and three short blasts，this is a （）.
A. vessel not under command
B. sailing vessel
C. vessel being towed (manned)
D. vessel being towed (unmanned)
[单项选择]While underway in thick fog you are on watch and hear the cry“man overboard”.Which type of maneuver should you make（）.
A. Figure eight turn
B. Round turn
C. Racetrack turn
D. Williamson turn
[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]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 underway in fog and you hear one prolonged blast followed by two short blasts.This is a vessel（）.
A. Towing
B. Engaged on pilotage duty
C. Aground in a fairway
D. Stopped and making no way through the water
[单项选择]Uncharted lights, fog signals and radar beacon transmissions may be（）near the station.
A. encountered
B. met
C. contacted
D. seen
[单项选择]Uncharted lights，fog signals and radar beacon transmissions may be（）near the station.
A. encountered
B. met
C. contacted
D. seen
[单项选择]In dense fog a vessel without operational radar may not be justified（）at all but should anchor if it is safe and practicable for her to do so.
A. to be underway
B. on under way condition
C. to stop engine
D. in being under way
[单项选择]You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）
A. Your speed must be reduced to bare steerage ways
B. A look-out is not required if the radar is on
C. The radar should always be kept on a short-range scale
D. Fog signals are only required when a vessel is detected by radar
[单项选择]You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?（）.
A. Your speed must be reduced to bare steerageway
B. A look-out is not required if the radar is on
C. Fog signals are only required when a vessel is detected by radar
D. The radar should always be kept on a short-range scale
[单项选择]The fog is lifted，so（）the radar．
A. close
B. open
C. switch off
D. switch on
[单项选择]Radar makes it possible for us（）in dense fog.
A. to be sailing
B. sailing
C. sail
D. to sail
[单项选择]Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）.
A. A vessel towed
B. A vessel not under command and unable to maneuver
C. A vessel anchored giving warning of her position
D. A vessel stopped dead in the water
