What is the difference between angle of loll and angle of heel

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What is the difference between angle of loll and angle of heel

The angle of loll and the angle of heel are two different concepts related to the stability of a ship. Here are the differences between the two:

Angle of loll:
- Occurs when a ship is in an unstable condition when upright, i.e., has a negative metacentric height.
- The vessel takes on an angle of heel to either port or starboard.
- The angle of loll is the angle of heel at which the vessel goes to neutral equilibrium.
- The angle of loll is determined by the values of GM and BM.
- A vessel at the angle of loll displays features of stable equilibrium, but it is a dangerous situation, and rapid remedial action is required to prevent the vessel from capsizing.

Angle of heel:
- Occurs when a ship is inclined to one side or the other.
- The angle of heel is the angle between the waterline and the deck.
- The angle of heel is caused by external forces such as wind, waves, or uneven loading of the vessel.
- The angle of heel is limited by the vessel's stability and the free surface effect of liquids on board.
- A vessel can return to its upright position after a heel, depending on its stability and the external forces acting on it.

In summary, the angle of loll occurs when a vessel is unstable when upright, while the angle of heel occurs when a vessel is inclined to one side or the other due to external forces acting on it.

Citations:
[1] Angle of loll https://en.wikipedia.org/wiki/Angle_of_loll
[2] What is Angle Of Loll in Ships? - Marine Insight https://www.marineinsight.com/naval-architecture/angle-of-loll/
[3] Angle of Loll - an overview | ScienceDirect Topics https://www.sciencedirect.com/topics/engineering/angle-of-loll
[4] Angle of Loll: Hidden Dangers to Stability - DMS Marine Consultant https://www.dmsonline.us/angle-loll-hidden-dangers-stability/
[5] What is Angle of Loll? - MarineGyaan https://marinegyaan.com/what-is-angle-of-loll/
[6] Angle of loll - Wärtsilä https://www.wartsila.com/encyclopedia/term/angle-of-loll

By Perplexity at https://www.perplexity.ai/search/269ebb9b-0adf-4756-84fa-274c90afd923?s=m

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