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. Chesapeake marine design offers a wide range of products and services in boat design and engineering including stock boat plans, custom yacht design services. 25′ cabin cruiser . build your own floating paradise. outboard motor cart . move your outboard around and store easily with this cart. flat bottom jon boat.