On Mon, 07 Jan 2008 21:08:30 GMT, Short Wave Sportfishing
wrote:

Rule 25 only describes a sailing vessel underway not motive power. The
only distinction related to motive power is that while under power,
the inverted cone shape must be displayed on the forestay.

The distinction, as I read it, says that under 20 meters, it's an
either/or - side/stern markers on the hull or combined on the
masthead.

If so, how would another vessel know if they were dealing with a power
boat or a sail boat? A sail boat under power is a power vessel with
regard to the right of way rules (contrary to what some think).