You dont need to lock it full on the cast control but you set it up as whatever the current is calling for. If Current is kicking you'll tighten down on it or current is slow you'll loosen it...you can preset it to never touch it again if you want as well. If im using it on the boat i like it cause i set it to let the line down at a good rate. Too many people try to reach bottom quick and will helicopter their bait on the way down.
