Season's Greetings Laurence,
LC> These are aids to navigation (buoys, lights) etc, and
LC> this symbology is found on charts.
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    Yes, but what I meant was, "describe the markers themselves, and the
locations where they are usually found".  It makes it a bit tougher that
way :^)  You were not only able to recognize the codes (symbols) as
navigation aids, but you were also able to decipher a few.  That's really
pretty good :^)  I posted definitions to these in a message to somebody
else a couple of posts back so I probably shouldn't post them again.  I've
got some real good navigation questions that I think I'll post a bit later
for all you guys that don't sail in the rain :^)
     Cheers,
             Augustin~~~===
                             National Yacht Club, Toronto - S2STOR - S2SVCR
... You don't buy beer, you only rent it!
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