OK, this is getting a little confusing ... did this event take place outside
the COLREG demarcation line I see just to the south of the island? Your
initial post has spun off some other discussions that could benefit from
this clarification.more below


"Roger Long" wrote in message
...
"Gary" wrote

Finally, how did you determine that risk of collision existed with this
yacht? What piece of information was key to causing you to maneouvre?

I had a very good sight of his stem head remaining exactly in line with
the masts for a long period of time in a steady wind during which he
remained in the same place behind my bow pulpit.

After I ran off about 100 yards, making a clear enough course change
demonstrate an intention for us to pass "one whistle", he passed about 50
yards to windward.

If you were outside the COLREGS line, your "one whistle" signal told the
skipper of the other vessel that "I am altering my course to starboard".
This would require no response from the other vessel. Inside the COLREGS
line your "one whistle" signal would indicate your intention to pass on his
port side and that he should either agree with a similar response or
disagree with a 5 whistle.

I am not trying to justify the other vessels actions or criticize your...
just understand what happened.