更多"Sidereal time is used by navigators"的相关试题:
[单项选择]Sidereal time is NOT used（）.
A. as the basis for star charts
B. to enter a star finder
C. in sight reduction using Pub 249
D. in sight reductions of planet observations
[单项选择]In determining the scope of cable to be used when anchoring，what would NOT be considered?（）.
A. Depth of the water
B. Character of the holding ground
C. maintenance cost for the chain
D. Type of anchor cable
[单项选择]（）should generally be used when handing rough or sharp objects.
A. Heat-resistant
B. Rubber gloves
C. PVC gloves
D. Leather gloves
[单项选择]What equipment is customarily used when seamen are working on a stage rigged over the side of a vessel（）.
A. Jacob's ladder
B. Manropes
C. Heaving lines
D. All of the above
[单项选择]A chain bridle is used when towing astern because it（）.
A. Is easy to connect
B. Provides an effective catenary and absorbs shock due to its weight
C. Makes rigging a swivel unnecessary
D. Prevents the tow from yawing by the drag of the chains in a seaway
[单项选择]Which channel and mode should be used when initiating a distress alert transmission（）.
A. Channel 6 DSC
B. Channel 6 Radiotelephony
C. Channel 13 Radiotelephony and channel 16 DSC
D. Channel 70 DSC
[单项选择]Wale shores would be used when drydocking a vessel with（）.
A. tumble home
B. excessive deadrise
C. excessive trim
D. a list
[单项选择]A “Mediterranean moor” should be used when（）.
A. anchoring in the Mediterranean
B. docking stern to a berth
C. docking bow to a berth
D. anchoring in a strong current
[单项选择]（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
A. As many as
B. So many as
C. As much as
D. As more as
[单项选择]Stand of the tide is that time when（）.
A. the vertical rise or fall of the tide has stopped
B. slack water occurs
C. tidal current is at a maximum
D. the actual depth of the water equals the charted depth
[单项选择]During daylight savings time the meridian used for determining the time is located farther （）.
A. west in west longitude and east in east longitude
B. east in west longitude and west in east longitude
C. west
D. east
[单项选择]The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.
A. one-millionth part of a second
B. one-thousandth part of a second
C. one-hundredth part of a second
D. one-tenth part of a second
[单项选择]Ammonia when used as a refrigerant is valuable because of its high efficiency, it is however （）.
A. toxic
B. flammable
C. explosive
D. all of the above
[单项选择]The term used in levying customs duties when such are fixed at rates proportioned to estimated value of goods concerned is （）.
A. ad valorem
B. infinite
C. secure
D. specific
