"while you may have right of way they cannot change course"
Um, in a channel, you DO NOT have right of way (small sailboat vs. large boat restricted in ability to maneuver in a channel). Power vs. sail is not the only rule at play.
Mike
That's an easy rule to remember! Substantially more difficult to decide on that rule when sailing by dead reckoning and are uncertain of position and have no visibility! Made worse by autopilots!! My point is that sailors presume right of way. As you assert, sometimes we don't have that, and knowing your position is sometimes very critical to the decision making process.