船舶避碰09.1 海上避碰规则2451A sailing vessel is overtaking a steam vessel in a fairway on International waters，so as to pass on the steam vessels port side The sailing vessel is the _. A. privileged vessel and would sound two short blasts B. burdened vessel and would sound two prolonged blasts followed by two short blasts C. burdened vessel and would sound no whistle signal D. privileged vessel and would sound no whistle signal KEY: B2452A stand-on vessel in a crossing situation is allowed to take action when _. A. on a collision course B. the vessels will pass within one mile C. it becomes apparent to her that the give-way vessel is not taking appropriate action D. the relative speed of the vessels indicates collision in less than six minutes KEY: C2453A towing vessel becomes tripped while towing on a hawser astern. What factor is MOST important when assessing the risk of capsizing? A. Length of the towline B. Height of the towline connection C. Longitudinal position of the towline connection D. Direction of opposing force KEY: B2454A vessel constrained by her draught shall，when risk of collision with another vessel in a crossing or head-on situation exists，_. A. apply the relevant Steering and Sailing Rules as a power-driven vessel B. apply the relevant Steering and Sailing Rules as a Sailing vessel C. apply the relevant Steering and Sailing Rules as a vessel not under command D. apply the relevant Steering and Sailing Rules as a vessel engaged in a towing operation KEY: A2455A vessel engaged in fishing underway sounds the same fog signal as a _. A. power-driven vessel stopped and making no way through the water B. vessel being towed C. vessel restricted in her ability to maneuver at anchor D. sailing vessel at anchor KEY: C2456A vessel has sustained damage in a collision with another vessel. It is necessary to have a Seaworthy Certificate before the vessel sails. Who will issue this certificate? A. American Consul B. Classification Society C. Captain of the Port D. Officer in Charge，Marine Inspection KEY: B2457A vessel is approaching from dead ahead Both of her sidelights are visible and her range lights are in line Which of the following could you do first？ _. A. Sound one blast of the whistle B. Alter course to starboard C. Construct a radar plot D. Sound the danger signal KEY: B2458A vessel is in sight of another vessel when _. A. she can be observed by radar B. she can be observed visually from the other vessel C. she can be plotted on radar well enough to determine her heading D. her fog signal can be heard KEY: B2459A vessel is in sight of another vessel when she _. A. can be observed by radar B. has determined that risk of collision exists C. is sounding a fog signal which can be heard on the other vessel D. can be observed visually from the other vessel KEY: D2460A vessel restricted in her ability to maneuver is one which _. A. through some exceptional circumstance is unable to maneuver as required by the Rules B. from the nature of her work is unable to maneuver as required by the Rules C. due to adverse weather conditions is unable to maneuver as required by the Rules D. has lost steering and is unable to maneuver KEY: B2461All of the following are practices of good seamanship EXCEPT _. A. When meeting，altering course to the left to increase sea room B. Maintaining an alert radar watch in reduced visibility C. Showing a flare-up light to attract attention when you are not under command D. Maintaining a proper lookout from sunrise to sunset KEY: A2462All of the following constitute special circumstances EXCEPT _. A. Three vessels meeting so as to cross each others course B. A vessel meeting a vessel that is backing out of a slip C. An overtaking situation that has reached in extremis D. A vessel fishing with nets meeting a sailing vessel KEY: D2463Any alteration of course andor speed to avoid collision shall，if the circumstances of the case admit，_ to another vessel observing visually or by radar A. be large enough to be readily apparent B. be a succession of small alterations C. be with due regard to the power and speed of the vessel D. leave sufficient room for the other vessel to take action KEY: A2464Any vessel _ any other shall keep out of the way of the vessel _. A. overtakingovertaken B. being overtakebeing overtaken C. overtakingbeing overtaken D. being overtakingovertaken KEY: C2465If it becomes necessary for a stand-on vessel to take action to avoid collision，she shall NOT，if possible，_. A. decrease speed B. increase speed C. turn to port for a vessel on her own port side D. turn to starboard for a vessel on her own p