单项选择题
Concentrated heavy loads are involved in loading a LASH vessel. What does NOT require close attention due to such loads while working cargo?（） .
A.GM - available and required
B.Longitudinal stress numeral
C.Tons per inch immersion numeral
D.Draft
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单项选择题
Compared to internal structural plating，the exterior hull plating on a vessel is usually（）.
A.stronger
B.thinner
C.more corrosion resistant
D.a lower grade steel -
单项选择题
Camber，in a ship，is usually measured in（）.
A.feet per feet of breadth
B.feet per feet of length
C.inches per feet of breadth
D.inches per feet of length -
单项选择题
Battens are fitted in cargo holds across the frames of the vessel from the turn of the bilge upward. The purpose of these cargo battens is（）.
A.for securing a snatch block when snaking cargo into the wings of the hold
B.to prevent cargo from coming in contact with the vessel's frames or shell plating
C.to provide fittings to which cargo lashings may be secured
D.to support the dunnage floors which are laid down between tiers of cargo
