Above photo: Using a Rio Lightline DT 2wt. with a Zen Outfitters 60" furled silk leader  to elude  brown trout on the Letort Spring Creek. A tiny 6'2" 2wt. fiberglass rod works  wonderfully with a simple DT fly line. An F-16 coming off an aircraft carrier deck reaches a speed of 165 mph in 2 seconds; that's a lot of velocity! It's also extremely noisy, many would say deafening. Now, velocity insinuates sound and the shapes of sound. Velocity also creates vibration, but stay with me here for a moment. Now imagine if you were a fish on the deck of that aircraft carrier in a tank of water. The fish has a lateral line, often called the “sixth sense” or “distant touch,” that is highly sensitive to electromagnetic impulses, vibrations, and sound in the water column. Coupling this with an F-16 producing 140 decibels at takeoff, the fish would be instantly stunned and fall to the bottom of the tank. This is a real test that has been an ongoing experiment with marine bio...