As most of you already know the 22 Sportsman is the model Chris-Craft used in the movie On Golden Pond which can take much of the credit for re-igniting the interest in these classic mahogany powerboats. The Thayer IV was the name of the boat used in the 1981 film On Golden PondThere were 3 Thayer IVs used in the movie including 1 replica used for a crash scene. Now its rumored that Katherine Hepburn rode around on her and owned her.