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Assessment: Ships & Tugs: Pivot Point

13 Aprile 2022

|By Maurizio Garipoli

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Domanda 1 of 5

1. Domanda

Where is located the pivot point of a ship in standard conditions?

The pivot point of a ship is about 1/3 of its length starting from the stern
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The pivot point of a ship is about 1/4 of its length starting from the bow
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The pivot point of a ship is about 1/3 of its length starting from the bow
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2. Domanda

What’s the behaviour of PP in shallow waters?

If the ship navigates in shallow water, the thrusters' resistance increases and the pivot point moves towards the stern, forward of the centre
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If the ship navigates in shallow water, the thrusters' resistance decrease and the pivot point moves towards the bow
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If the ship navigates in shallow water, the thrusters' resistance increases but the pivot point is not affected
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3. Domanda

If we make fast two tugs of equal power, transverse working on a ship forward-moving, one forward and one aft, …

…we will have that the bow tug will favour the turning with a more significant moment than the fore one
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…we will have that the stern tug will favour the turning with a more significant moment than the fore one
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…we will have the same effect fore and aft
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4. Domanda

How can it be helpful to know the behaviour of the PP?

For example, if we are in difficulty bringing a ship to the berth in the presence of high beam winds, we can move the PP
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The Pivot Point it is not very useful in manoeuvring
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The PP can only help us at speeds above 6 knots
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5. Domanda

Where does the PP move with the ship moving backwards?

With the ship moving backwards, the pivot point moves aft, favouring the turning moment of the bow
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With the ship moving backwards, the pivot point moves toward the ship's bow
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With the ship moving backwards, the pivot point still almost in the same position
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