题目
In which case would an overtaking vessel sound a whistle signal of two prolonged followed by one short blast?A. When overtaking in restricted visibility.B. When overtaking in a narrow channel.C. When overtaking on open waters.D. When no other vessels are in the immediate area.
In which case would an overtaking vessel sound a whistle signal of two prolonged followed by one short blast?
A. When overtaking in restricted visibility.
B. When overtaking in a narrow channel.
C. When overtaking on open waters.
D. When no other vessels are in the immediate area.
题目解答
答案
B. When overtaking in a narrow channel.
解析
本题考查的是航海中追越船舶在不同场景下的笛号信号知识。解题的关键在于熟悉各种场景下追越船舶应发出的特定笛号信号规定。
- 选项A：在能见度受限的情况下，追越船舶并没有规定要发出“两长声继以一短声”的笛号信号。通常在能见度受限时，船舶会按照相关规定发出表示自身存在和动态的其他信号，所以选项A不符合要求。
- 选项B：根据航海规则，当追越船舶在狭水道中追越时，应发出两长声继以一短声的笛号信号。这是为了向被追越船舶和其他附近船舶表明其在狭水道这一特殊环境下的追越意图，所以选项B正确。
- 选项C：在开阔水域追越时，追越船舶发出的笛号信号与在狭水道追越不同。开阔水域追越有其特定的笛号规则，并非“两长声继以一短声”，所以选项C错误。
- 选项D：即使附近没有其他船舶，追越船舶也需要按照规定发出相应的笛号信号来表明其追越行为。而且“两长声继以一短声”是狭水道追越的特定信号，并非在无其他船舶时使用，所以选项D错误。