Newman-Tuck slender body theory

Newman-Tuck slender-body theory expands the ship flow in powers of the small beam-and-draft to length ratio, reducing each cross-section to a two-dimensional inner problem matched to a one-dimensional outer wave field along the hull. Tuck developed the steady slender-ship form in the early 1960s and Newman extended it to oscillatory ship motions in waves and, with Tuck (1974), to ship-to-ship interaction forces. It bridges strip theory and full three-dimensional theory, giving the longitudinal coupling that pure strip methods miss, and it is valued for wave resistance, squat, and maneuvering interaction estimates at moderate cost.