Which COLREGs rule addresses interactions between Power-Driven and Sailing Vessels?

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Interactions between different vessel types are specifically addressed to prevent collisions when maneuverability differs. Rule 18 makes it clear that a power-driven vessel shall keep out of the way of a sailing vessel, recognizing that sails limit a vessel’s ability to maneuver as quickly as a powered vessel. In practice, when a power-driven vessel and a sailing vessel are on a potential collision course, the power-driven vessel should take early and substantial action to avoid, while the sailing vessel generally maintains its course and speed unless it’s necessary to take action to avoid. An exception to this is when the sailing vessel is overtaking another vessel, in which case the overtaking rule applies.