My depth sounder only reads to 500'. At 1.5 miles offshore I'm in over
500' of water depth. How can I chart the bottom contours?

Capt. Mooron wrote:
"The Captains Master" wrote in message

| When you do calculations for every bottom contour and its effect on
| current for every 100 metres of your trip.....yep, tonnes of paper.

You're reading way to much into my inquiry about bottom contours.... like
Bob you probably think you have to actually dive down and map it... that was
just too funny!

Don't you verify if the charted depth conforms with your depth sounder
readings at regular intervals Oz???

CM