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Assessment: Bollard Pull

13 Aprile 2022

|By Maurizio Garipoli

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Domanda 1 of 5

1. Domanda
Define the Bollard Pull
- The Bollard Pull is the most used measure to indicate the push force in metric tons or kilonewtons of a tugboat
- The Bollard Pull is the most used measure to indicate the pull force in metric tons or kilonewtons of a tugboat
- The Bollard Pull is the most used measure to indicate the speed in knots of a tugboat
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2. Domanda
How is the BP determined?
- To determine this, one end of the towline is fixed to a suitable bollard, and the tug gradually pulls
- By a dynamometer measures the force exerted
- Both the answers are correct.
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3. Domanda
Why will the exerted Bollard Pull never be the theoretical one?
- Because we have also – and not only – to consider ship's and tug's speed
- Because we have – and not only – to consider weather conditions and reflected waves
- Both of the above answers are correct
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4. Domanda
Is it always necessary to calculate the tug’s Bollard Pull before a manoeuvre?
- These calculations are rarely necessary since the Bollard Pulls of the available tugs are known values, and – in case of doubt – it is sufficient to ask the tug master in assistance directly
- Yes, because otherwise, we are missing a fundamental element
- No, it is useless data for the manoeuvre
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5. Domanda
Define BHp
- BHP means Brake Horsepower. It measures the Hp of an engine considering the loss in power caused by propeller
- BHP means Brake Horsepower. It measures the tug' wake power
- BHP means Brake Horsepower. It measures the Hp of an engine without considering the loss in power caused by some engine parts
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