When being propelled by wind alone and without auxiliary motive force.
When sails are up and are producing more momentum then power (if the vessel is still using power to make way)
the power driven vessel needs to give-way for sailing ships.
Steer into the wind.
When the auxiliary engine is not running or is being assisted by sail power
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
**Not sure why this was flagged, I hand typed this.Rules of the RoadRule 9-Steering & Sailing RulesInternational/Inland(b) A vessel of less than 20 meters in length or a sailing vessel shall not impede the passage of a vessel that can safely navigate only within a narrow channel or fairway.***This applies to sailing vessels that are tacking in a channel or fairway.Rule 18Steering and Sailing Rules.Responsibilities Between Vessels.Except where Rules 9,10 and 13 otherwise require:(a) A power driven vessel underway shall keep out of the way of:(iv) a sailing vessel.(b) A sailing vessel underway shall keep out of the way :(i) a vessel not under command(ii) a vessel restricted in her ability to maneuver .
In Australia, sailing boats only have to give way to commercial boats. When collision is imminent. Exercising your "right of way" can be detrimental to your lives and crafts.
There are general rules for which vessel should give way but circumstances dictate which vessel does give way and which one stands on.For instance, there are many occasions when a sailing vessel not only should but must give way to a power driven vessel. A few examples are as follows.If the power driven vessel is:Engaged in fishingEngaged in diving operationsNot under commandHas restricted manouverability due to its draught.Has right of way.See the link below for Rules for Preventing Collisions at Sea for a more comprehensive collection.
Rules of the RoadRule 9-Steering & Sailing RulesInternational/Inland(b) A vessel of less than 20 meters in length or a sailing vessel shall not impede the passage of a vessel that can safely navigate only within a narrow channel or fairway.***This applies to sailing vessels that are tacking in a channel or fairway.Rule 18Steering and Sailing Rules.Responsibilities Between Vessels.Except where Rules 9,10 and 13 otherwise require:(a) A power driven vessel underway shall keep out of the way of:(iv) a sailing vessel.(b) A sailing vessel underway shall keep out of the way :(i) a vessel not under command(ii) a vessel restricted in her ability to maneuver .
Rules of the RoadRule 9-Steering & Sailing RulesInternational/Inland(b) A vessel of less than 20 meters in length or a sailing vessel shall not impede the passage of a vessel that can safely navigate only within a narrow channel or fairway.***This applies to sailing vessels that are tacking in a channel or fairway.Rule 18Steering and Sailing Rules.Responsibilities Between Vessels.Except where Rules 9,10 and 13 otherwise require:(a) A power driven vessel underway shall keep out of the way of:(iv) a sailing vessel.(b) A sailing vessel underway shall keep out of the way :(i) a vessel not under command(ii) a vessel restricted in her ability to maneuver .
A power driven vessel is often understood to be a mechanically driven boat. Human power as in rowing or wind driven power is not usually considered power driven.