A.pumped overboard to calm the seas
B.drained to the lower hull to reduce free surfaces
C.filled to ensure that sufficient fuel oil is available during a lengthy emergency
D.partially drained to increase free surfaces in order to reduce motions

A.angle that the propeller makes with a free stream of water
B.angle that the propeller makes with the surface of the water
C.number of feet per revolution the propeller is designed to advance in still water without slip
D.positive pressure resulting from the difference of the forces on both sides of the moving propeller in still water without slip

A.The catenary in a hawser should be sufficient so that the hawser just touches the bottom
B.The hawser is of sufficient length for towing when taut between tug and tow
C.Increasing speed usually increases the catenary in the hawser
D.Shortening the tow hawser generally decreases the maneuverability of the tug

A.is used mostly by towing vessels
B.has a maximum depth of 14 feet (4.3 meters) at MHW
C.West Gap has a controlling depth of 24 feet
D.is entered through the East Gap or the West Gap

A.rolling period
B.amplitude moment
C.inclining moment
D.pitching period

A.ballasting
B.deballasting
C.disconnecting
D.hanging off

A.Increasing the length of the towing hawser
B.Trimming the tow by the bow
C.Trimming the tow by the stern
D.Drogues put over the stern

A.in trays constructed of material that is resistant to the electrolyte
B.so as to prevent movement when the vessel pitches and rolls
C.in a well ventilated area
D.All of the above

A.It has a small GM
B.It pitches heavily
C.It has an unusually high center of gravity
D.Its period of roll is short

A.She will have a large metacentric height
B.Her period of roll will be large due to her large metacentric height
C.She will have an unusually high center of gravity
D.She will pitch heavily