TRAILERING SUPPORT DEVICE AND METHOD, AND MARINE VESSEL INCLUDING TRAILERING SUPPORT DEVICE

A trailering support device capable of supporting a trailering operation for loading a hull onto a trailer. The trailering support device acquires characteristic information predetermined as information indicating a relationship between a steering angle of the hull and a turning radius of the hull, acquires relative position information between the trailer and the hull, detects the steering angle of the hull, predicts future movement of the hull based on the acquired characteristic information, the acquired relative position information, and the detected steering angle, and generates a predicted trajectory, and notifies of a positional relationship between the hull and the trailer and notifies of the generated predicted trajectory.