A towing vessel is tripped when（）.

A . There shall be at least 3 ventilator ducts open to the atmosphere B . At least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilge C . At least one intake duct shall extend from the open atmosphere to the lower portion of the bilge D . Only vessels using fuel with a flash point above 110°F need ventilate engine and fuel compartment

A . Both towheads will tend to drift apart，and the overtaking vessel will be slowed down B . Both towheads will tend to drift together，and the overtaking vessel will be slowed down C . Both towheads will tend to drift apart，and the overtaken vessel will be slowed down D . Both towheads will tend to drift together，and the overtaken vessel will be slowed dow

A . yellow lights at each end B . two red lights in a vertical line C . a black ball D . a diamond shape

A . towing vessel is less than 50 meters B . towing vessel is greater than 50 meters C . tow is less than 200 meters D . tow is greater than 200 meter

A . tow strain B . catenary length C . being in step D . Williamson's Tow

A . change course B . slow down C . heave to D . adjust tow line length

A . The sea anchor deploys B . The floor inflates C . If upside down，the craft rights itself D . The painter detaches from the raft

A . displacement B . stability C . towrope pull D . propeller desig

A . The sea anchor deploys B . The floor inflates C . If upside down, the craft rights itself D . The painter detaches from the raft

A . only the lights for a vessel towing B . only the lights for a vessel restricted in her ability to maneuver C . the lights for a towing vessel and the lights for a vessel restricted in her ability to maneuver D . the lights for a towing vessel and the lights for a vessel not under command

A . the masthead lights for a towing vessel B . the lights for a vessel restricted in its ability to maneuver C . sidelights，stern light and towing light D . All of the above

A . Certificate of Documentation B . Certificate of Inspection C . Operators Merchant Marine license D . FCC Station License

A . three masthead lights in a vertical line instead of either the forward or after masthead light B . two masthead lights in a vertical line instead of either the forward or after masthead lights C . two towing lights in a vertical line at the stern D . a small white light aft of the funnel

A . Length of the towline B . Height of the towline connection C . Longitudinal position of the towline connection D . Direction of opposing force

A . pushed ahead B . towed alongside C . towed astern D . Any of the above

A . There cannot be a radiotelephone located anywhere except in the wheelhouse B . The officer in charge of the wheelhouse is considered to have the radiotelephone watch C . Only distress messages may be transmitted over channel 13 D . Only the Master of the vessel is allowed to speak over the radiotelephone

A . crew members using their arms B . crew members using the strong muscles of their legs C . fenders D . No fending is necessary due to the rugged construction of most towing vessel

A . The Officer in Charge，Marine Inspection B . The Master，or person in charge of the vessel C . The vessel's owner or manager D . The company's port captain or port engineer

A . the masthead lights for a towing vessel B . the lights for a vessel restricted in her ability to maneuver C . sidelights，stern light，and towing light D . All of the above

A . no fog signal B . one short blast C . one prolonged and three short blasts D . one prolonged，one short，and one prolonged blast

A . shock loading on the tow line is reduce B . towing speed is improved C . the vessel is more visible from the tug D . the catenary of the tow line is reduced

A . The towing line between the two vessels should be clear of the water B . The towing line should be taut at all times between the vessels C . There should be a catenary so the line dips into the water D . None of the above

A . not exceed bare steerageway during the transit B . take a strain as soon as you can to control the tow C . come up to speed very slowly and maintain a safe speed D . come up to speed quickly，then cut back power considerably to ease the strai

A.pushed ahead B.towed alongside C.towed astern D.Any of the above