题目

The vessel is sighted 50^circ abeam the port beam, distance off determined by radar is 3 miles, TCPA 47 minutes. Risk of collision or a close quarter situation is developing. What action should the OOW take?A. Alter course to starboard, sounding one short blast on the whistleB. Establish if risk of collision exists, and or a close quarter situation is developingC. Maintain course and speed, continuing to monitor the situationD. Alter course to port, sounding two short blasts on the whistle

The vessel is sighted $50^\circ$ abeam the port beam, distance off determined by radar is 3 miles, TCPA 47 minutes. Risk of collision or a close quarter situation is developing. What action should the OOW take?

A. Alter course to starboard, sounding one short blast on the whistle

B. Establish if risk of collision exists, and or a close quarter situation is developing

C. Maintain course and speed, continuing to monitor the situation

D. Alter course to port, sounding two short blasts on the whistle

题目解答

答案

A. Alter course to starboard, sounding one short blast on the whistle

解析

本题考查航海中避碰规则及值班驾驶员在遇到可能碰撞或近距离局面时应采取的行动。解题思路如下：

  1. 首先明确题目中给出的信息，船舶在左正横后$50^{\circ}$方向被发现，雷达测定距离为3海里，TCPA（到达最近会遇距离的时间）为47分钟，且存在碰撞危险或近距离局面正在发展。
  2. 根据《国际海上避碰规则》，当存在碰撞危险或近距离局面时，值班驾驶员需要采取行动避免碰撞。
  3. 分析各个选项：
    • 选项A：向右转向并鸣放一短声。在这种情况下，向右转向可以增加两船的距离，避免碰撞，鸣放一短声是表示本船正在向右转向，这是符合避碰规则和实际操作要求的行动。
    • 选项B：确定是否存在碰撞危险或近距离局面正在发展。题目中已经明确说明存在这种情况，所以不需要再进行确定，该选项不符合要求。
    • 选项C：保持航向和航速并继续监控情况。在已经明确存在碰撞危险或近距离局面时，保持航向和航速可能会导致碰撞事故的发生，所以该选项不正确。
    • 选项D：向左转向并鸣放两短声。向左转向可能会使两船的距离更近，增加碰撞的风险，所以该选项也不正确。