When I was in High School I went fishing with my dad and Granddad out of Harker's Island, NC. My granddad had a 32' Hatteras with twin diesels. We were on our way out one morning approaching Cape Lookout Coast Guard station when we ran aground, in the MIDDLE of the marked channel. In the process we sheared off the port prop.
The port side was about 2.5' deep while to starboard you couldn't see bottom. We had to wait for the tide to lift us off before we could return to the Harker's Marina.
My Granddad was rather hacked off with the Coast Guard. Then we find out that Jimmy Harker's Charter boat, the Cape Lookout ferry, AND the Coast Guard had all been aground the week before, in the same spot, AT THE SAME TIME.
WWG1WGA
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)


Sometimes the only way to find the bottom is to run into it.