Abstract
Establishing the passage plan is a basic operation of the Deck Officer in safe navigation. During operation, the Officer On Watch (OOW) needs to determine the waypoint as well as calculate the wheel-over point. The calculation process has been guided by the International Maritime Organization (IMO) and implemented under the International Safety Management System (ISM). However, in maritime areas with changing current flow, especially in the narrow channel, it is not simple for calculating the wheel-over point. This article focuses on the method of determining the wheel-over point when altering the course of the ship in the narrow channel with the influence of the current. Thence, the program of calculating the wheel-over point to support OOW maneuver the ship safely and effectively is provided.