12 December 2001
Interior Channels. The dimensioning of interior channels protected from
open sea waves and strong cross currents is shown in Figure 5-17, where B = beam of
Ship-Lane Widths. Where good operating conditions (that is, a maximum
ship speed of 10 knots, currents less than 3 knots, good visibility, and
wind less than 15 knots) exist, the following ship-lane widths should be
Vessel Maneuvering Characteristics
Lane Width as a Multiple of
Excellent CG and DD
Good FFG, CV, AOE, and LSD 36
Poor Submarines, Tenders, AE, and AS
Ship Clearance. Ship clearance is normally assumed to be equal to the
beam at waterline of the largest vessel. Where a channel is to be
frequently used by aircraft carriers having large overhanging decks,
increase the clearance between ship lanes to maximum vessel breadth.
Bank Clearance. Vessels traveling in restricted waterways experience
hydrodynamic suction from the banks. This is offset by rudder-angle
adjustment. Results of limited model studies are shown in Figure 5-18.
For sustained travel by a naval vessel in a restricted channel, a 5-degree
rudder angle is a desired maximum.