The task was simple: design a fun, family boat that’s easy to drive through the water and yet is as stable as a flat-bottomed row boat. the result is this stylish. Composite cruiser – the primary purpose of this design was to build a small pram style boat that was ultra-lightweight, easy and inexpensive to build, was unsinkable. Free pontoon boat plans. well look what we have cooking here: free plans to make your own pontoon boat! length: 12′ (3.7 m).