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.By day，she shall carry a black cylinder shape
B.By day，she shall carry two black balls in a vertical line
C.By night，she would show the same lights as a vessel not under command
D.By day，she would show the same shapes as a vessel restricted in her ability to maneuver

A.A vessel which cannot avoid a close-quarters situation with a vessel forward of her beam shall reduce her speed to bare steerageway
B.A vessel which hears a fog signal forward of her beam shall stop her engines
C.A vessel which hears a fog signal forward of the beam shall navigate with caution
D.If a vessel determines by radar that a close-quarters situation is developing，she shall take avoiding action in ample time

A.It automatically maintains tow line tension
B.It prolongs the life of the hawser by distributing chafing as the hawser is paid out and taken in
C.As tension on the hawser increases，more line is taken in by the automatic towing engine
D.As tension on the hawser decreases，more line is taken in by the automatic towing engine

A.A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from astern
B.A vessel is dead in the water when the back wash from astern operation reaches the bow
C.A tunnel bow thruster can be used in an emergency to reduce the stopping distance
D.When a vessel is dead in the water any speed displayed by doppler log reflects the current