What does three short blasts from a larger vessel signify?

Three short blasts from a larger vessel primarily signify that the vessel is either reversing or stopping. This sound signal is an important part of maritime communication, as it helps to inform other vessels in the area of the larger vessel's intentions. Understanding these sound signals is crucial for maintaining safety on the water, as they communicate the actions of vessels without visual contact being necessary.

In situations where visibility is limited or when vessels are navigating in close quarters, recognizing this sound can prevent collisions and ensure safe passage. The distinction of three short blasts is specifically recognized internationally, aligning with established maritime rules, thereby promoting standardization in communication at sea.

The other choices relate to different maneuvers or intentions of vessels but do not correspond to the meaning of three short blasts. Understanding these signals can significantly enhance the safety and awareness of all vessels operating in the same waters.