Final Answer:
9 short every 15 seconds (or every 10), morse code distress signal (option B)
Step-by-step explanation:
In maritime communication, the Morse code distress signal is indicated by a sequence of nine short signals every 15 seconds (or every 10 seconds in some cases) thus option B is correct. This pattern is universally recognized as a distress call, signaling an urgent need for assistance.
The choice of nine short signals has a practical purpose. Morse code relies on a combination of short and long signals to represent letters and numbers. In the distress signal, using nine short signals ensures a distinct and easily recognizable pattern, distinguishing it from other Morse code messages. The repetition every 15 seconds (or every 10 seconds) enhances the likelihood of the distress signal being detected promptly, aiding in swift response and assistance.
Mariners and rescue services are trained to recognize this specific Morse code pattern, emphasizing its critical role in alerting others to a vessel or individual in distress at sea. This standardized signal is a crucial component of maritime safety protocols and highlights the importance of effective communication in emergency situations.