What do six short blasts and one long blast mean from a ship horn? - Quora
Sound Signals Used for Encountering Situations
What Do Cruise Ship Horn Signal Blasts Mean?
FAQ] What are the Different Types of Alarms on Ships? - mfame.guru
Sound Signals
YACHTMASTER LIGHTS SHAPES AND SOUND SIGNALS, IRPCS
Marine Insight - There are different types of signals one can use onboard ships to indicate that your ship is in distress. Let us know in the comments what other distress signals
which signal should I have used please? - Boat Handling - Canal World