Abstract
A hull form definition system consisting of a hull geometry acquisition program and two hull design tools for fishing crafts was developed. One tool for definition involved hull variation where the longitudinal positions of the stations were changed and mapped to common parameters. In the other tool, hull forms were generated by selecting simple shapes representing boundary curves of hull surfaces. Different hull surfaces were produced by defining families of curves based on the edges. Analysis modules such as hydrostatics and reference charts for powering requirements were included for evaluation purposes. The results were also referred to a related knowledge based advisory system that gave necessary advice and guidance.