Resistance Tests with UBC Series Fishing Vessels

Resistance model test results for a systematic series of low LIB, heavy displacement vessels are presented. The UBC Series is based on west coast seiners and trawlers. These vessels have low LIB and L/V/1/3 values that are outside the range of existing model series data. A parent hull form was developed that has 14% less resistance and yet has the same displacement as a typical fishing vessel. A series of 13 models was generated by systematically varying L/B, BIT and Cb. Results from resistance tests in calm water are presented. From these model tests, an algorithm has been developed to predict the resistance of similar small vessels. The implementation of bulbous bows to the parent hull shows reduction in the overall resistance by approximately 17%. Also, the introduction of stern fairing reduces the resistance by about 25% at the design speed.