I love catch and release because it means I will have really nice fish to catch next year and so will you and your children and their children ect. Since there are now many laws related to slot limits it is nice to have a quick way to measure our fish and get them in the cooler or back in the water as quickly as possible. Here is a little something we installed when we traded boats this summer.
Photos are: 1) A sturgeon too long for the 48″ measuring strip on the bottom of the old boat. These are much like over grown aluminum T squares the carpenters use to measure sheet rock. Minus the T of course. We pop riveted them in place. They are available at Menard’s, Lowes, Home Depot, ect. You can tell we have been fishing a few days because the floor is slimmed up pretty good. 2) This is a fatty cat that either hasn’t been measured yet or hasn’t been tossed back in. The deck is really slimy here. In fact, the deck would get so bad by the third day of fishing it was almost impossible to walk. 3) because of that, we put this platform (trough) in the new boat so we could just lift them up once out of the net, do a quick measure and over they go. Works terrific even on large sturgeon. This will measure up to 62″, our current record instead of the 48″ in the old boat. We like bigguns. 4) & 5) Some looks at the removable head plate. You just slide the fish up to the plate, push the tail down and out they go. The plate is removable so it will not cut the boat cover once we head home. The sides of the platform do not go the whole length so it is easy to take a bucket of water or a hose and wash it down. Sorry the order on the photos got mixed a little but you get the picture. 
If not then a good fisherman will add a few inches 
Or as my Dad says, Heck it is cheaper then a shrink 
