單項選擇題Flanking rudders effect a vessel’s heading because of the().

A.Effect of the propeller flow on the rudders
B.Water flow due to the vessel's movement through the water
C.Tunnel affect of the water flow past opposing rudders
D.Discharge current being channeled to impinge on the vessel's deadwood


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1.單項選擇題Cribbing is().

A.wooden blocks or dunnage placed between a deck load and the deck
B.the chains and shackles used to secure a deck cargo
C.a crate in which a deck cargo is packaged
D.cardboard separation pieces placed between deck loads to prevent chafing

4.單項選擇題An intermediate spring is().

A.Fitted in each leg of the towing bridle
B.Generally located between the “fishplate” and the main towing hawser
C.Secured at the “H” bitts
D.Usually made of manila hawser

5.單項選擇題A spanner is a().

A.cross connection line between two main fire lines
B.special wrench for the couplings in a fire hose line
C.tackle rigged to support a fire hose
D.none of the above