What method did early FRP boat builders use for hull design?

Early Fiberglass Reinforced Plastic (FRP) boat builders predominantly relied on the empirical method for hull design. This approach is based on observation and experience rather than mathematical models or sophisticated technological tools. Builders would utilize their knowledge gained from previous designs, testing small-scale models, and direct experience on the water to shape hull forms that performed well in terms of stability, speed, and maneuverability.

The empirical method allowed builders to iterate on designs based on tangible evidence gathered from how boats handled in various conditions, making it a practical choice given the tools and knowledge at the time. As the industry progressed, designers began to incorporate more advanced techniques, but in the early days, this hands-on, experience-based approach was fundamental to achieving functional and effective boat hulls.