Abstract: A navigation control system includes an obstacle detector on a hull to detect a distance from a hull to an obstacle on a water surface and a position of the obstacle, a thruster on the hull to generate a propulsive force, a steering to steer the thruster to right and left sides of the hull, and a controller configured or programmed to perform a control to determine an obstacle avoidance route based on a route function including at least an indicator of a lateral acceleration that acts on the hull during steering of the thruster when the obstacle is detected by the obstacle detector.

Abstract: A marine propulsion system includes a controller configured or programmed to perform a marine vessel traveling direction control such that a traveling direction of a marine vessel is changed to a predetermined angle equal to or greater than a first angle with respect to a traveling direction of waves toward the marine vessel when the traveling direction of the marine vessel is less than the first angle with respect to the traveling direction of the waves toward the marine vessel.

Abstract: A marine vessel maneuvering system includes a controller configured or programmed to perform a water entry determination control to determine whether or not water behind a hull that rises above a water surface due to deceleration of the hull may enter the hull when the hull is decelerating.

Abstract: In an attack operation receiving step, an input of an operation for attacking an enemy object is received. In a determination step, when the input of the operation for attacking is received, it is determined whether or not a body strength value of the enemy object is within a predetermined range. When it is determined that the body strength value of the enemy object is within the predetermined range, a setting step of setting the enemy object to substantially the same state as where the body strength value of the enemy object is zero, regardless of the degree of damage caused by the attack motion, is executed.

Abstract: In an attack operation receiving step, an input of an operation for attacking an enemy object is received. In a determination step, when the input of the operation for attacking is received, it is determined whether or not a body strength value of the enemy object is within a predetermined range. When it is determined that the body strength value of the enemy object is within the predetermined range, a setting step of setting the enemy object to substantially the same state as where the body strength value of the enemy object is zero, regardless of the degree of damage caused by the attack motion, is executed.

Abstract: A method for treating a sugar solution in which one, two or more than two kinds of esters selected from the group consisting of glycerol mono-aceto mono-fatty acid ester, glycerol mono-aceto di-fatty acid ester and glycerol di-aceto mono-fatty acid ester composed of a fatty acid of 12 carbons or composed of mixed fatty acids consisting at least 40% of a fatty acid of 12 carbons and the rest being fatty acids of 8 to 14 carbons are added to the sugar solution during a process of manufacturing sugars.