What do two short blasts from another vessel mean?

Two short blasts from another vessel typically indicate that the vessel is intending to overtake or pass on the starboard (right) side. This is part of the navigational signals used to communicate intentions between vessels to ensure safety at sea. It's important for mariners to understand these signals to avoid collisions. Always refer to the International Regulations for Preventing Collisions at Sea (COLREGs) for detailed guidance on sound signals.