John Rybovich Sr., Michael's grandfather, was a fisherman with carpentering skills who fell into the boat-repair business out of necessity, keeping his and fellow fishermen's boats on the water. With the help of his three sons, Johnny, Tommy and Emil, the business evolved. They started converting existing cruisers into fishing boats by adding crude outriggers and fighting chairs. In 1947, the three-brother team collaborated to build its first boat specifically designed for tuna fishing. Soon after, they launched Miss Chevy II and forever changed boatbuilding by developing evolutionary processes used for years to come. The Rybovich boys raised the bar again in 1952 with Miss Chevy IV, introducing the broken sheer line as a design element, and they created the first aluminum tuna tower. For the next two decades, the brothers continued to enhance their sport-fisherman designs.