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A hand held instrument used to measure distances between objects and the ship is a ______.
A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
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单选题If you must jump from a ship，your posture should include（）.A
holding down the life preserver against the chest with one arm crossing the other，covering the mouth and nose with a hand，and feet togetherB
knees bent and held close to the body with both arms around legsC
body straight and arms held tightly at the sides for feet first entry into the waterD
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current flow in a circuitB
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circuit continuityD
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as a connecting strap between the butted ends of platingB
to stiffen areas under points of great stress between beamsC
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单选题An aneroid barometer is an instrument（）.A
used to measure the speed of windB
in which the pressure of the air is measuredC
that tells which direction a storm is coming fromD
used to measure the height of waves
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at obscured objectsB
forward submerged targetsC
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for unseen objects
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单选题Which instrument is used to measure the relative humidity of air?（）A
HydrometerB
HygrometerC
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单选题A hand held instrument used to measure distances between objects and the ship is a（）.A
vernierB
psychrometerC
hygrometerD
stadimeter
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单选题An immersion suit should be equipped with a/an（）.A
air bottle for breathingB
whistle and hand held flareC
whistle，strobe light and reflective tapeD
whistle，hand held flare and sea dye marker
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A red parachute flareB
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单选题A sling psychrometer is a(n)（）.A
type of cargo gearB
instrument used in celestial navigationC
instrument used to measure relative humidityD
instrument used to measure specific gravity
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单选题On chart，bearings to near objects should be used in preference to objects farther off，because（）.A
a small error in bearing or in laying it down on the chart has a greater effect in misplacing the position the longer the line to be drawnB
all scales are kept updated for vital information by Notices to MarinersC
the larger the scale of the chart，the greater the detail that can be shown on itD
the mariner using the medium scale charts for passage along a coast need not transfer on to a large scale for short distances
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单选题A carling is used aboard ship（）.A
as a connecting strap between the butted ends of platingB
to stiffen areas under points of great stress between beamsC
to prevent the anchor from fouling when the brake is releasedD
to provide an extra heavy fitting in a lift cargo released
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ability to floatB
deadweightC
freeboardD
midships strength
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单选题（）provides a selection of commonly used routes with their distances between principal and important positions.A
The Mariner‟s HandbookB
Admiralty Sailing DirectionsC
Ocean Passages for the WorldD
Mariner‟s Routeing Guide
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