Sb-9 when is a sailboat the stand-on vessel in relations to a recreational power boat

A stand-on vessel sailboat is related to a boat's recreational power when such vessel is sailing alone and crossing the powerboat's path alone. A stand-on vessel is a power vessel that should maintain its speed and course when meeting other vessels in the sea. Having a collision is possible with such a vessel. This is why the International Regulations for the prevention of Collisions at the sea allows stand-on vessels to do something in order to avoid a collision.