Which vessel is permitted to sound the danger signal?

The ability to sound the danger signal is universally applicable regardless of the type of vessel or situation. The danger signal is typically a series of five short blasts on the vessel's horn or whistle, intended to alert other vessels of a possible collision or to communicate that there is a perceived danger.

Vessels in various situations, including the stand-on vessel, the give-way vessel, and even a vessel at anchor, may encounter situations where sounding a danger signal is necessary for safety. For instance, if a stand-on vessel recognizes that a collision may occur despite its right of way, it should signal to alert others. Similarly, a give-way vessel may sound the danger signal if it’s unable to comply with the rules of navigation in a safe manner. A vessel at anchor can sound the danger signal if it observes another vessel approaching in a hazardous manner.

Thus, it is essential for all types of vessels to be able to communicate potential dangers effectively, ensuring safety and adherence to maritime regulations. This is why the correct response encompasses all vessels, reflecting the universal nature of the danger signal in maritime practice.