In reduced visibility, it means the presence of another watercraft.
You are operating a motorboat. You hear one prolonged blast from the horn of another vessel. What should you do?
If you are operating a motorboat and your motorboat is being overtaken by a sailboat, you should maintain present course and speed. The vessel that is overtaking another vessel is the give-way vessel, regardless of whether it is a sailing vessel or a power-driven vessel. The vessel being overtaken is always the stand-on vessel.
You should avoid operating your motorboat or pwc above no wake speed near the shore because engine efficiency is reduced.
You should take action to avoid a collision.
It causes erosion
B
Do everything possible to avoid it. The motorboat operator would give way if boat is under sail but go by regular motorboat rules if he is under power.
Stay out of the way! One prolonged blast is the whistle signal for a ship leaving a berth or in a blind bend in a channel.
When a motorboat approaches a sailboat head-on, the motorboat should give way to the sailboat. According to the maritime right-of-way rules, the motorboat is responsible for avoiding a collision and should maneuver to the right to pass the sailboat safely. The sailboat, being under sail, has the right of way in this situation. It's essential for both vessels to communicate clearly to ensure safe navigation.
Assuming neither boat is beleaguered and each craft has sea room, each bears to starbord.
He would give way if boat is under sail but go by regular motorboat rules if he is under power.
The sailboat has the right-of-way until the motorboat gets ship-sized, when it assumes the right-of-way.