On open waters, a power-driven vessel must keep out of the way of which type of vessel?

In navigational rules, a power-driven vessel is obligated to keep out of the way of a sailing vessel, which is classified as a vessel under sail. This rule stems from the general principle that sailing vessels have the right of way over power-driven vessels when they are under sail, as they are considered to have less maneuverability.

Sailing vessels rely primarily on wind for propulsion and may not be able to change direction as quickly as power-driven vessels. Thus, when encountering a sailing vessel, the power-driven vessel must take measures to avoid a collision, ensuring the safety of both vessels. This priority given to sailing vessels is a primary aspect of navigational safety practices and aligns with international maritime regulations.

It's important to recognize that while fishing vessels and recreational vessels both have certain navigational rights, the clear priority in this scenario pertains specifically to vessels under sail, which includes sailing vessels as a category.