In order to assess the maneuvering qualities of a 120 ft USCG patrol boat design, straight-course and rotating-arm captive model tests were conducted. Tests were carried out at two speeds, two turning radii (plus straight course), at a range of drift and roll angles, for a single load and LCG combination.

The data were analyzed to obtain simple expressions for hydrodynamic forces and moments in terms of the test parameters. These expressions were used in conjunction with the equations of motion of the vessel in four degrees of freedom to obtain trajectory predictions (including roll behavior) for the patrol boat.

This content is only available via PDF.
You can access this article if you purchase or spend a download.