The displacement weight method, although widely used, is somewhat misunderstood. This is an attempt to clarify some of the uncertainties related to displacement loading. Displacement loading uses the fact that 1.02 pounds of trout displace 1.0 pound of water, regardless of fish size. Usually a transportation tank is filled with water to a specific mark on the inside of the tank. The fish are loaded until the water reaches a second mark.
Water is filled to the same mark each time.
Fish are added to a second mark to load the specified pounds.