The underwater profile of the line as it is trolled through the water is shown for a typical freshwater trolling condition in the below picture (black graph). Using an anchor loc… See more

Two of the factors have a relatively small effect. The least important is line strength-at least within … See more

Note that these curves are very shallow, meaning depth changes are minor for significant changes in line strength. If, for example, we look at a narrow range of four and six-pou… See more

All of these calculations assume that we know our trolling speed. If a current is flowing in a river, we must make our measurements relative to the water. Speed along a sho… See more