From today's edition of 'Lectronic Latitude, comes the following:
"Have you ever been looking at a nautical chart and thought, "Hmm. I wonder what the heck that squiggly little line means?" If you're like most experienced sailors, many chart symbols are fairly obvious. But you sometimes come across graphical patterns that are downright puzzling, especially since charts
generally do not have comprehensive 'keys' clarifying the symbols used."
For more on Chart No. 1,
a handy little book to help a person understand the meanings of obscure chart symbols, go to:
Latitude 38 - Northern California's Premier Sailing and Marine Magazine