This means that the keel-less Flats Cat will not hit sub surface strata while there is any water below the boat at speed. However, when equipped with a tilt and trim engine and a standard 5" Jack Plate, skeg drag will occur in about 3 1/2" of water, signaling the boat operator to seek deeper water. This is a built-in safety factor for shallow water running, which has been well received and appreciated by our boat owners.