The catenary in a hawser should be sufficient so that the hawser just touches the bottom
The hawser is of sufficient length for towing when taut between tug and tow
Increasing speed usually increases the catenary in the hawser
Shortening the tow hawser generally decreases the maneuverability of the tug
第1题：
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited ________．
A.It is required on all vessels
B.It may be located in a conspicuous place in the wheelhouse
C.It may be located at the bilge and ballast pump control station
D.All of the above
第2题：
Which statement concerning GPS is TRUE ________．
A.It cannot be used in all parts of the world
B.There are 12 functioning GPS satellites at present
C.It may be suspended without warning
D.Two position lines are used to give a 2D fix
第3题：
Concerning baby-sitting and managing a paper route, which of the following statement is true?
A． Both call for daily service.
B． Both call for a sense of responsibility.
C． Neither is affected by bad weather.
D． Neither is helpful to character development.
第4题：
By day，she shall carry a black cylinder shape
By day，she shall carry two black balls in a vertical line
By night，she would show the same lights as a vessel not under command
By day，she would show the same shapes as a vessel restricted in her ability to maneuver
第5题：
Which statements concerning the switch construct are true？（）
第6题：
Which statement is TRUE concerning combustible gas indicators ________．
A.One sample of air is adequate to test a tank
B.They do not work properly where there is a lack of oxygen
C.They will detect a lack of oxygen
D.They are calibrated to read the percentage chance of explosion
第7题：
An ocean tow is sinking in deep water. Attempts to sever the towing hawser are unsuccessful Which action should now be taken?______.
A.Abandon the towing vessel.
B.Radio for emergency assistance.
C.Slip the towline and allow it to run off the drum.
D.Secure all watertight openings on the towing vessel.
第8题：
Which statement is TRUE concerning the flash point of a substance ________．
A.It is lower than the ignition temperature
B.It is the temperature at which a substance will spontaneously ignite
C.It is the temperature at which a substance，when ignited，will continue to burn
D.It is the temperature at which the released vapors will fall within the explosive range
第9题：
increase control of the tow
prevent the towing vessel from going in irons
make the towing vessel less maneuverable
reduce shock stress on the towing hawser
第10题：
Abandon the towing vessel
Radio for emergency assistance
Slip the towline and allow it to run off the drum
Secure all watertight openings on the towing vessel