PIVOT POINT

HEAD WAY, STEADY COURSE & SPEED

AHEAD BELL FROM DIW... LONG STEERING LEVER FROM PROPS/RUDDERS

ASTERN BELL FROM DIW... NO EFFECTIVE STEERING LEVER UNTIL SOME STERN WAY

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REFERENCES: HOOYER

Notes:

RETURNING TO THE PIVOT POINT, WE CAN SEE HERE HOW THE PROPELLER’S LONGITUDINAL FORCE WILL IMPACT THE SHIP’S PIVOT POINT. REMEMBER A KICK AHEAD WILL MOVE THE PIVOT POINT FORWARD. A KICK ASTERN WILL MOVE THE PIVOT POINT AFT. AS WE WILL SEE IN A MOMENT, THIS WILL IMPACT THE EFFECTIVENESS OF OUR RUDDER BY INCREASING OR DECREASING THE LEVER ARM.