Adrift

In your statement about an adrift vessel, you say that it is underway, and "must give way" to a sailboat. However, I have a couple of issue with this: 1) The reference picture shows a sailboat with no sails, which would make it a power boat, so in that case the "sailboat" should give way to the vessel adrift, 2) an adrift vessel can be pointing in any direction, and you could potentially be approaching from the stern, or it may even be drifting away from the sailboat. In either of those cases, the sailboat or powerboat would be an overtaking vessel, and would have to give way. 3) There is a difference between a vessel "under way" and "making way", and while a vessel adrift is considered underway, I think that unless they are in the middle of a narrow channel, or other thoroughfare where they are a hazard, a vessel "making" way (either by sail or power) should always give way.