Plato wasn’t talking about fishing when he wrote, “necessity, who is the mother of our invention,” although it certainly does apply to our sport. A perfect example is the ability to hold a boat in a precise location in shallow water. The traditional method of slipping an anchor over the side and cleating off the line works, obviously. But that technique is noisy, time-consuming and not exact. It can also damage sensitive sea grasses or bottom habitat. Staking off with an implanted push pole does the job too, unless the bottom is hard-packed sand or rock. Plus, graphite push poles tend to snap when flexed under extreme pressure. That is why skinny-water enthusiasts now have several options to quickly — and quietly — keep boats stationary to cast to wary fish. Floridian John Oliverio, president of JL Marine Systems, which makes Power-Pole, led the movement to develop a better way to stay put in the shallows.