If you don't have/can't borrow a hand held depth sounder
, then the following methodology seems to work:
Get a pretty heavy weight (dive weight, etc), tie it on a bit of line so that it hangs down to a depth equal to your draft
(plus whatever makes you comfortable), tie it off on your dinghy
. Wait until low water
through the channel watching the weight line. If it does not hit bottom, neither will you! And of course, you might well wait for high tide to move your boat.
If there is any doubt we've found it better to check ourselves rather than depending on info from others. Especially, we've found that it is a bad idea to follow some newly met local in a canoe who promises to "take you to the best anchorage"... they simply don't always understand how deep a yacht's keel
Jim and Ann s/v Insatiable II lying Towlers Bay, NSW, Oz