更多"To obtain accuracy in fixing by DF "的相关试题:
[单项选择]To obtain accuracy in fixing by DF，（）and three stations should be used.
A. parallel bearings
B. long-range bearings
C. short-range bearings
D. cross bearings
[单项选择]（）is not a position-fixing system.
A. Hifix
B. Hyperfix
C. Trisponder
D. WGS84
[单项选择]Diesel engines obtain combustion air through turbo chargers，blowers，or（）.
A. air starters
B. carburetors
C. natural aspiration
D. air receivers
[单项选择]The fixing of a canceling date on a charter-party merely（）warning to the Shipowner that non-arrival by this date may result so as to entitle the Charterer to rescind.
A. takes
B. comes
C. goes
D. gives
[单项选择]In using reduction gears to obtain efficient propeller speeds, （）.
A. they must be located at the after end of the engine
B. they can only be used with one engine at a time
C. they eliminate the need for controllable pitch propellers
D. they are connected to the engine with a flexible coupling
[单项选择]Where do you obtain approved placards containing instructions for the launching and inflation of an approved inflatable liferaft? （）
A. Officer in Charge，Marine Inspection
B. The manufacturer of the liferaft
C. Maritime Administration
D. The owner of the vessel on which the liferafts are carried
[单项选择]A navigator fixing a vessel’s position by radar （）.
A. should never use radar bearings
B. should only use radar bearings when the range exceeds the distance to the horizon
C. can use radar information from one object to fix the position
D. must use information from targets forward of the beam
[单项选择]Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
A. In the Coast Pilot
B. In the Nautical Almanac
C. In the List of Lights
D. In the Sailing Directions
[单项选择]To obtain maximum efficiency, two stage air compressors are usually （）.
A. horizontally mounted
B. never fitted with intake filters
C. fitted with intercoolers
D. operated in an unloaded condition at all times
[单项选择]（）should be consulted to obtain the information concerning port documents required by the port Authority.
A. Admiralty Notices to Mariners
B. SOLAS
C. Admiralty Sailing Directions
D. Guide to Port Entry
[单项选择]You must obtain（）from the landowner to fish in this river.
A. permission
B. omission
C. celebration
D. graduation
[单项选择]The carrier can obtain（）for loss caused to him by the shipper stating the particulars of the goods inaccurately.
A. an indemnity
B. liability
C. responsibility
D. possibility
[单项选择]The common way to obtain your ship’s position is（）.
A. keeping a close watch and lookout
B. taking a radar range and bearing
C. observing a radar target and listening to signals
D. keeping a well clear caution
[单项选择]To become an officer on board, you must obtain（）.
A. an officer's license
B. an officer's promotion
C. an officer's statement
D. a seaman's book
[单项选择]Radar is not only to obtain（）,but also to measure their distance away from you.
A. brightness of obtain
B. color of targets
C. shape of targets
D. bearing of objects
