INTERACTION

What do you know about interaction? Gave 2 ship models.

Interaction is the reaction of the ship’s hull to pressure exerted on its underwater volume.

Describe the risks if the overtaking vessel is too close?
● The most important one would be a risk of a close quarter’s situation resulting in a collision caused by the interaction of both vessels in a narrow channel. This is because the pressure bow wave from the overtaking vessel could push my stern toward the bank, and the bank effect push my bow into the channel, and a collision resulting;
● Also a suction effect between the two vessels can pull them together when they are parallel to one another;
● One or both vessel could encounter a steering failure or a propulsion failure resulting in a loss of command;
● Note: Even though in a narrow channel, the overtaking vessel is not relieved of her obligations under ‘Rule 13’ (Overtaking).