單項(xiàng)選擇題In a married falls rig at the after end of a hatch,a boom is rigged in a fore and aft line through its heel.Stresses on the outboard guy will be LEAST if the guy is made fast at a point().

A.Abreast the heel
B.At right angles to the boom when viewed from above
C.Aft of the heel
D.Forward of the spiderband


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1.單項(xiàng)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

2.單項(xiàng)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

5.單項(xiàng)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