Assessment: Ship’s Interaction

1 Maggio 2022

|By Maurizio Garipoli

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Domanda 1 of 9

1. Domanda

How many and what are the phases that summarise the encounter between ships?

Three: bow suction – hull cushion – stern suction.
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Four: bow suction – pressure balance – hull suction – stern suction.
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Four: bow cushion -pressure balance – hull suction – stern suction.
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2. Domanda

How do we find the centre of the fairway channel?

We can identify it as the area where the rudder acts at its best, with similar angles to one side or the other.
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It is always marked by buoys.
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It is easily identifiable by looking at the banks.
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3. Domanda

Which ship is most affected by overtaking interactions?

The larger of the two.
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The smaller of the two.
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Both, no matter the size.
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4. Domanda

If you make a mistake in manoeuvring during overtaking, is it beneficial to stop the headway using the engine astern?

Yes, using the engine helps to position the ship and reduce speed.
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Yes, if both ships do it at the same time.
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It must be carefully considered. Using the engine would have disastrous effects.
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5. Domanda

What are the effects of interactions when overtaking in a narrow channel?

An increase in the speed of the overtaken ship.
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A push on the stern of the overtaken ship that makes it sheer.
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A suction between ships followed the spacing of the bows and draw of the sterns.
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An increase in the speed of overtaking ship at the end of overtaking.
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All the answers are correct.
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6. Domanda

What is meant by Trapping?

The entrapment of the overtaking ship that cannot complete the overtaking
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The entrapment of the overtaken ship that is pushed by deviating on its route
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It is the suction effect between two overtaking ships.
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7. Domanda

How can you overtake safely in a channel?

The overtaken ship should approach the bank as the ship passes to compensate for the thrust it receives from the latter.
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The overtaken ship must slow down to almost stop, while the overtaking vessel can do so at minimum speed.
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The speed of the overtaking ship must be at least 3 knots higher than the speed of the overtaken vessel.
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8. Domanda

How can we visually recognize the current is set?

By the orientation of the vessels at anchor.
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By Eddy Waters on the berakwaters.
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Both answers are correct.
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9. Domanda

What’s the invisible force that affects heavy drafted vessels?

The current that pushes the hull underwater and, to a lesser extent, the wind
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The wind that pushes the superstructures and, to a lesser extent, the current
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There are no invisible forces that can overcome the engine power of a vessel
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Assessment: Ship’s Interaction

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