Remind's me of the day's pre chronograph in shooting. Bullet's were going as fast as the manuals said they were! I got a used John boat about a year and a half ago with a 20hp Honda. Not a clue how fast if goes but I can get around a lake faster than walking! Wish I knew how fast it was going just so I could try trolling, never done much of that. Been looking at GPS speedometer's on Amazon and think for the price I'll get one. Even if it doesn't work they aren't expensive! Kind of like the old reloading manual's; if the GPS say's I'm doing 1 1/2mph then that's got to be what I'm doing!
