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Keep clear... The power driven vessel should, if possible, maintain course and speed. The only rule for overtaking is that you keep your distance while overtaking
The overtaking craft should give way, as the overtaking craft should be the one with the most control, as it is initiating the move.
where should you avoid overtaking
the one on the port
No. If the vehicle you are passing is going at the correct speed, why should you need to overtake. When overtaking a vehicle you should ensure there is enough clear road ahead of you to pass the vehicle without over speeding. If this is not the case you should not attempt an overtaking manoeuvre.
The speed limit is applicable when overtaking another vehicle, just as it is at any other time. A police officer observing you overtaking another vehicle MIGHT decide what you did was within reason, and not bother you, but they have full authority to pull you over for exceeding the speed limit- even when overtaking a slower moving vehicle- should they decide to.
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 only overtake if it is safe to do so.
stop the car.
You should avoid overtaking on a double yellow line, hill, curve or any weather condition where you can't safely see if you can overtake the vehicle in front of you.
I would add that a smaller boat overtaking a larger boat or ship should always give way or alter its course because a larger boat or ship cannot quickly slow down or change its course. The larger vessel already underway should continue, without the added concern of an overtaking smaller boat causing a collision.
You are about to be passed and should maintain course and speed