The investigation on the error introduced into maneuvering predictions by the use of a set of linearized equation of motion which ignore momery effects has been made for SWATH ship by applying the transient method suggested by Scragg. Two sets of experiments were conducted to measure a complete set of the coefficients.
Maneuvering predictions were then made using two different sets of linearized equations of motion, one which included memory effects and one which excluded memory effects.
It was determined that significant errors occured only during the initial phase of the maneuver, and that memory effects be safely ignored for most deepwater maneuvering problems of a SWATH ship as is the case of the conventional surface ships.
