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

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