Marine propulsion system, control method therefor, and marine vessel

Abstract

A marine propulsion system includes a first propulsion device that is steerable and located at a stern of a hull, a second propulsion device that is steerable and located in front of the stern, a controller configured or programmed to include an obtaining unit to obtain information about a propulsion force of the first propulsion device in forward and backward directions, and information about a propulsion force of the second propulsion device, a determination unit to determine whether to cause the first propulsion device during a lateral motion of the hull to generate a propulsion force in a direction in a first range including a component in the forward direction, or to generate a propulsion force in a direction in a second range including a component in the backward direction based on the obtained information, and a storage to store a content determined by the determination unit.