When the motorized vessel is a commercial vessel or when the motorized vessel has another vessel or person in tow.
mooring buoy?
A visible white light indicates that the other vessel is a power-driven vessel.
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.
If you see a vessel displaying only a white light, it indicates that the vessel is a power-driven vessel. This vessel is approaching you head-on or is overtaking you. In both cases, you should be prepared to take action to avoid a collision.
the power driven vessel needs to give-way for sailing ships.
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.
You are approaching the stern of another vessel
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.
when the power-driven vessel is towing another boat and has difficulty maneuvering
The power-driven vessel should change course and speed.
Steer into the wind.
When the auxiliary engine is not running or is being assisted by sail power