A.actual depth of water
B.actual depth of water below keel
C.average depth from waterline to hard bottom
D.average depth of water to soft bottom
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A.floors
B.intercostals
C.girders
D.stringers
A.camel
B.dolphin
C.rat guard
D.wedge
A.bottom floor
B.outer bottom
C.shear plating
D.tank top
A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay
A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load
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The function of the bypass valve on the self-contained breathing apparatus is to（）.
Anchors are prevented from running out when secured by the（）.
An example of a modern anchor which has a stock is a(n)（）.
In ship construction，keel scantlings should be the greatest（）.
Permission is kindly requested（）the ballast water.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
All electrical appliances aboard a vessel should be grounded to（）.
In relation to cargo gear，what does SWL mean?（）.
An integral part of a blowout preventer that serves as the closing element on an open hole，and whose ends do not fit around the drill pipe but seal against each other and shut off the space below completely is the（）.
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.