On Mon, 07 Mar 2005 00:23:03 GMT, "Roger Long"
wrote:

Would someone please refresh my memory about the sounding contour
lines on charts?

They are fathom lines, the first 6 feet MLW, the next 12, etc. Is
that right?


Depends on the chart. The chart title block should show the units for
soundings (most Canadian chart now give depths in metres). You should
be able to determine the contour intervals by looking at the
surrounding soundings. Canadian charts often have numbers indicating
the contour depth inserted in the contour line.

There is an excellent publication called "Chart 1: Symbols and
Abbreviations" that should be available from any chart dealer. It
will tell you more than you ever wanted to know about the symbols and
abbreviations used on nautical charts. (note that both Canadian and
US authorities produce a "Chart 1", but the content is different!!)


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
new newsgroup users info : http://vancouver-webpages.com/nnq
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca