Abstract: A boat maneuvering system includes an operating unit including an operator, and a controller configured or programmed to control a magnitude and a direction of a propulsion force generated by a propulsion device of a boat in response to an operation performed on the operating unit. When a hold start operation is performed on the operating unit during boat maneuvering using the operator, the controller shifts to a first boat maneuvering state to perform a hold control to hold a control index that is at least either one of an index correlated with the magnitude of the propulsion force generated by the propulsion device or a velocity of the boat. When a steering operation is performed on the operator in the first boat maneuvering state, the controller changes the direction of the propulsion force generated by the propulsion device while maintaining the first boat maneuvering state.

Abstract: A watercraft maneuvering system includes watercraft maneuvering stations to steer and adjust a propulsive force of a watercraft and including a main station including a steering wheel to steer the watercraft and an acceleration lever to adjust the propulsive force, and a substation spaced apart from the main station and including a joystick to both steer the watercraft and adjust the propulsive force. By operating a joystick button provided in the substation, an operative station may be switched from the main station to the substation. At the same time, a control mode may be switched to a joystick mode.

Abstract: A bird's-eye view image generating device for a vessel generates a bird's-eye view image from a view point above a vessel by projective transformation of images obtained by cameras installed on the vessel into a bird's-eye view plane. Imaging regions to be respectively imaged by the cameras are positioned such that imaging regions adjacent to each other have an overlapping region. A method of calibrating the bird's-eye view image generating device includes acquiring calibration images by imaging a calibration marker with the cameras in which the calibration marker is positioned in the overlapping region in a calibration plane, and acquiring application parameters to be applied for projective transformation of the calibration images into the calibration plane so that images of the calibration marker included in the calibration images match each other.

Abstract: A marine vessel maneuvering system includes an operator to receive both a propulsive force operation to change a propulsive force of a propulsion device and a steering operation to turn the propulsion device to steer a marine vessel, and a controller configured or programmed to perform a control to automatically drive the propulsion device to move the marine vessel in an automatic marine vessel maneuvering mode. The controller is configured or programmed to perform a control to transition to the automatic marine vessel maneuvering mode based on a transition operation being performed on the operator.

Abstract: A vessel speed control system includes a lever operator on which an operation is performed to increase or decrease a propulsion speed of the vessel, a transition operator on which a transition operation is performed to transition a normal operation mode to a speed control mode, and a controller configured or programmed to perform a control to prevent transition to the speed control mode even when the transition operation is performed on the transition operator during a restriction period of time including at least an acceleration/deceleration period of time during which a rotation speed of an engine or the propulsion speed of the vessel is changed by the lever operator in the normal operation mode.

Abstract: A marine vessel maneuvering system includes a controller configured or programmed to perform a shift-out start control to control a shift actuator to immediately start an intermittent operation mode from a shift-out state when an intermittent operation switching control is performed to switch a normal operation mode in which a shift-in state continues to the intermittent operation mode in which the shift-in state and the shift-out state are repeated in a predetermined period of time based on a user's operation.

Abstract: A fuel filter device is disclosed. The fuel filter device has a first member that includes a main body tubular portion and a first connection tubular portion for connecting the first member to a fuel pipe. The main body tubular portion includes a flow channel cross-section greater than that of the first connection tubular portion. The main body tubular portion includes a first end portion and a second end portion. The first connection tubular portion is disposed on the first end portion. An opening is provided through the second end portion. A filter element portion is accommodated in the main body tubular portion. A second member includes a lid portion and a second connection tubular portion for connecting the second member to a fuel pipe. The lid portion covers the opening of the main body tubular portion.

Abstract: A bird's-eye view image generating device for a vessel generates a bird's-eye view image from a view point above a vessel by projective transformation of images obtained by cameras installed on the vessel into a bird's-eye view plane. Imaging regions to be respectively imaged by the cameras are positioned such that imaging regions adjacent to each other have an overlapping region. A method of calibrating the bird's-eye view image generating device includes acquiring calibration images by imaging a calibration marker with the cameras in which the calibration marker is positioned in the overlapping region in a calibration plane, and acquiring application parameters to be applied for projective transformation of the calibration images into the calibration plane so that images of the calibration marker included in the calibration images match each other.

Abstract: A fuel filter device is disclosed. The fuel filter device has a first member that includes a main body tubular portion and a first connection tubular portion for connecting the first member to a fuel pipe. The main body tubular portion includes a flow channel cross-section greater than that of the first connection tubular portion. The main body tubular portion includes a first end portion and a second end portion. The first connection tubular portion is disposed on the first end portion. An opening is provided through the second end portion. A filter element portion is accommodated in the main body tubular portion. A second member includes a lid portion and a second connection tubular portion for connecting the second member to a fuel pipe. The lid portion covers the opening of the main body tubular portion.