Join Date: Jul 2012
Location: Near Georgian Bay, Ontario, Canada
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Re: Why do people still use depth sounders?
When you are using a chart plotter/GPS instrument, you likely need not to refer to depth all that much. I do still use the depth meter to double check depth that is supposed to be under the keel - since (rarely) there can be a GPS error, or (more likely) a chart error (where I sail some charts have not been updated since first plotted in the late 1800s...). When the GPS/chartplotter relies on an incorrect chart, it is prudent to have something else to help you out.
I do rely on the depth meter when anchoring to determine required scope as well as to assist in ensuring that I have sufficient swing room.
Of course you can do all this with a lead line, but I doubt that is very practical when you are about to set anchor - that little gadget does the job just fine.
Now, all of this is true so long as you have electricity to power your electronics, and electronics that work... but that is another chapter in the Book of Purists.
Last edited by Donna_F; 09-01-2014 at 03:48 PM.