It doesn't matter how forcefully the boat pulls in the course of fishing, it’s this fiberglass spike’s grip that holds the boat in one position. You can consider this to be a sort of spike anchor. They're expensive relative to what I paid out for my trolling motor, but even https://smallboatpowerpole74285.ssnblog.com/32034612/not-known-facts-about-boat-power-pole-installation-cost