How many horn blast signal passing on the starboard side?

The number of horn blast signals passing on the starboard side typically depends on the specific maritime regulations and the context of the situation. Generally, a single blast indicates a vessel's intention to pass on the starboard side. However, in certain scenariOS, multiple blasts may be used for further clarification or to signal other maneuvers. Always refer to the International Regulations for Preventing Collisions at Sea (COLREGs) for precise guidelines.