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?

Roger,

I just took a quick look at one of mine (13283), and it looks like the
contour lines correspond to the sounding numbers, which - as I'm sure
you know - are mean low low water, not mean low water.

The soundings are in feet, and the contours are multiples of six feet
(i.e. fathoms) that seem to line up with them.

Regards,
Al
s/v Persephone