Patent ID: 11915595
Assignee: JAPAN HAMWORTHY & CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A collision-avoidance maneuvering method in congested water, in which when two ships crossing each other on a course in congested water are likely to collide with each other, an own ship is maneuvered with collision avoidance while viewing another ship on a starboard side,
the method comprising the steps of:
maneuvering the own ship decelerated so as to avoid collision with the other ship, the own ship being decelerated by astern power against an inertial force applied in a forward direction of the own ship, the own ship being continuously navigated on a current target course with a propulsion propeller always rotated forward at a stern of the own ship, the astern power being generated as propulsion of a propeller slipstream with rudder angles formed at a pair of right and left high-lift rudders disposed behind the propulsion propeller;
controlling, in the decelerating maneuvering, the rudder angles formed at the high-lift rudders within a range from a rudder angle for applying a maximum propeller slipstream as the astern power to a rudder angle for eliminating ahead power of the propeller slipstream, and controlling the deceleration of the own ship by changing the astern power according to the rudder angles; and
controlling the rudder angles of the high-lift rudders so as to continuously navigate the own ship on the target course by using the propulsion of the propeller slipstream as the ahead power after the other ship crosses the course of the own ship.