Look for some type of rope, string or wire tied to the dock going into the water. That will be an indication there is some type of struck there. And as mentioned above...Good luck.
It's all coming together and we have you covered @ Shut-Up-And-Fish LLC
for all your Humminbird, Minn Kota & Motorguide needs.
We install & educate as well!!! 972 822 9285