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Assessment: Bank Effect

1 Maggio 2022

|By Maurizio Garipoli

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Domanda 1 of 9

1. Domanda
What is the difference between channel and canal?
- The channels are influenced by the wind, while the current influences the canals.
- The former are artificial made, the latter natural.
- The former are natural waterways (channels). The latter are artificial (canals).
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Domanda 2 of 9

2. Domanda
Do we have the same effects in artificial canals and natural channels?
- No, the artificial and regular banks create constant and higher forces than the natural channels.
- No, in natural channels the forces generated dissipate faster.
- No, seemingly similar areas in natural channels can hide banks with very different effects.
- All the answers are correct.
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3. Domanda
Why does a bank suck a ship?
- Because of the Venturi effect.
- For the tidal current that flows faster along the banks.
- Because of the squat effect.
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4. Domanda
Is the ship’s approach to the bank/side always parallel?
- Yes, the Venturi effect accelerates the fluid threads by creating a depression on the entire hull.
- No, when the ship approaches, it experiences the cushion effect at the bow and suction at the stern.
- No, when the ship approaches, it experiences the suction effect at the bow and the cushion at the stern.
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5. Domanda
What is the minimum safety distance from the bank?
- A distance greater than the breadth of the ship itself.
- ½ of the ship's breadth.
- ⅓ of the ship's breadth.
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6. Domanda
What can happen if the ship gets too close to a bank?
- The ship could be pushed forward and pulled astern so hard that it can sheer violently.
- The side effects may be so strong that the use of the rudder is insufficient to counter them.
- If the speed is low while suffering from the effects, the ship may use helm and kicks to regain control.
- All the answers are correct.
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Domanda 7 of 9

7. Domanda
How do you deal with the bend of a canal?
- At constant speed.
- Once you enter the bend, slow down the engine and the use tide current.
- As with a car, you enter at low speed and accelerate when exiting.
- At the lowest possible speed.
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Domanda 8 of 9

8. Domanda
Why is central positioning in channels important?
- Because it is possible to take advantage of the side effects to corner the bend
- Because the ship always remains under helm control
- All the answers are correct
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Domanda 9 of 9

9. Domanda
An incomplete canal curve, but with a transverse waterway, what does it entail?
- The current coming from the waterway can push the ship towards the inside of the bend.
- The effect of any current will vary its strength on the hull as the ship moves through the channel.
- The bank effects on the side of the waterway stops.
- All the answers are correct.
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