Do you wander up or down a river to be alone while fishing? Of course you do. What do you have with you for survival? What is with you and what is left back in the rig? Build your kit and decide what can be easily carried with you. One item I am never without are two whistles. One is a Storm Whistle. The other  one is a Hi-Gear Rescue Whistle. I have whistles in my pontoon boat, float tubes, truck, packs, day packs….I have whistles. More than once the whistle has come into play for myself and my sons while fishing or bushwhacking. A basic tool, but do you one with you?