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US 2003/0140836 A1Published application
Ship and operating method therefor
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsToshinobu Sakamoto, Satoru Ishikawa
Life of this patent
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Abstract
A ship of the invention comprises: a main propeller 2 which can move the ship forward and reverse by normal rotation, reverse rotation or by changing the pitch angle; a drive unit which drives the main propeller 2; a rudder 3 which changes the course of the ship; and at least one pod propulsion unit 10A, 10B. As a result, the support mechanism and the turning mechanism of the pod propulsion unit arranged separated to the main propeller can be simplified, and cost can be reduced.
Claims9
A ship comprising:
- a main propeller which can move the ship forward and reverse by normal rotation, reverse rotation or by changing the pitch angle;
- a drive unit which drives said main propeller;
- a rudder which changes the course of said ship;
- and
- at least one pod propulsion unit.
2 more elements
A method of operating a ship, wherein said ship comprises:
- a main propeller which can move the ship forward and reverse by normal rotation, reverse rotation or by changing the pitch angle;
- a drive unit which drives said main propeller;
- a rudder which changes the course of said ship;
- at least one pod propulsion unit;
- a speed log which measures the speed of said ship;
- and
- a control unit which controls a rudder angle of said pod propulsion unit by means of a signal from said speed log,
- said operating method comprising the steps of:
- when the ship speed obtained by said speed log exceeds a predetermined value, changing the course direction of said ship by changing only the rudder angle of said rudder;
- and
- when said ship speed is less than a predetermined value, changing the course direction and/or the travelling direction of said ship using said rudder and said pod propulsion unit together, or using only said pod propulsion unit.
8 more elements
Dependencies are inferred from the claim text.