ANGLE OF LOLL ( AOL) , Definition, Example & Correction
SAILORSTUBE・2 minutes read
Understanding the capsizing lever and angle of heel is crucial in ship stability, with the center of gravity playing a key role. Shifting weight to adjust the center of gravity is essential in preventing a potential capsize when a vessel heels.
Insights
- Understanding the capsizing lever and angle of heel is crucial for ship stability, with the center of gravity shifting as the vessel heels, potentially leading to capsize if uncontrolled.
- Different formulas are used based on the angle of heel: GJ = m * sin(theta) for angles below 15° and a more complex formula for angles exceeding 15°, emphasizing the importance of precise calculations in ship stability management.
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Recent questions
What is the importance of understanding the capsizing lever and angle of heel?
It is crucial to understand the capsizing lever and angle of heel to prevent potential capsize incidents.
What formula is used when the angle of heel is less than 15°?
The formula GJ = m * sin(theta) is used when the angle of heel is less than 15°.
How does the center point C shift when a vessel heels?
When a vessel heels, the center point C shifts towards the lower side, affecting the center of gravity.
What method is suggested to adjust the center of gravity?
Shifting weight is suggested to adjust the center of gravity, such as balancing weight on both sides or prioritizing tanks with larger vertical distances.
What is the wall side formula used for?
The wall side formula, GJ = sin(theta) * m + 1/2 * bm * 10^2 * theta, is applied when the angle of heel exceeds 15° to manage the center of gravity effectively.
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Summary
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Managing Center of Gravity for Vessel Stability
- Understanding the capsizing lever and angle of heel is crucial, with the center of gravity acting vertically downwards from the waterline and the geometric center of the water area being the center point C.
- The formula GJ = m * sin(theta) is used when the angle of heel is less than 15°, while the formula GJ = sin(theta) * m + 1/2 * bm * 10^2 * theta is applied when the angle of heel exceeds 15°, known as the wall side formula.
- When a vessel heels, the center point C shifts towards the lower side, affecting the center of gravity and potentially leading to a capsize if not managed properly.
- To adjust the center of gravity, shifting weight is suggested, with a method involving balancing weight on both sides or prioritizing tanks with larger vertical distances to lower the center of gravity effectively.
