Correcting an Angle of Loll - Advanced Ship Stability for Mariners
HTML-код
- Опубликовано: 2 авг 2024
- This video explains the theoretical concept of angle of loll and the procedures for correcting it. Knowledge from this video will help mariners answer exam questions and practical tasks at sea. To enhance knowledge on ship stability, students must also watch the below listed videos.
This is video 32 in the series of videos on ship stability.
Students are advised to watch the previous videos (links below) before watching this video.
1) Ship Stability (Volume, Mass, and Density): • Ship stability basics ...
2) Ship Stability (Pressure and Thrust): • Ship Stability Basics ...
3) Ship Stability (Displacement and Under-water volume): • Ship Stability - Displ...
4) Ship Stability (Deadweight, TPC, and Reserve Buoyancy): • Ship Stability - Dead...
5) Ship Stability (Load lines, effect of density on draft and displacement): • Ship Stability - Load ...
6) Ship Stability (Shift in the centre of gravity and KG calculation): • Ship Stability - Shif...
7) Ship Stability (Centre of Buoyancy): • Ship Stability - Cente...
8) Transverse statical stability of ships: • Transverse statical st...
9) Equilibrium of ships and Angle of Loll: • Ship Stability - Equil...
10) Calculate free surface correction on ships: • Ship Stability - Calcu...
11) Calculation and correction of ship’s list: • Ship Stability - Calcu...
12) Extra questions on ship’s list calculation and correction: • Ship Stability - Extra...
13) Hydrostatic tables (Part 1): • Ship stability - The u...
14) Hydrostatic tables (Part 2): • Ship Stability - The ...
15) Hydrostatic draft: • Ship Stability - Calcu...
16) KM and BM calculation: • Ship stability for Mat...
17) KM curves drawing and calculation: • Ship Stability for Mat...
18) Simpson’s First Rule: • Advanced Ship Stabilit...
19) Simpson’s Second Rule: • Ship Stability - Simps...
20) Combination of Simpson’s First and Second Rule: • Ship Stability - Combi...
21) Simpson’s Third Rule: • Ship Stability - Use o...
22) Calculate volume using Simpson’s Rules: • Using Simpson's Rules ...
23) Fresh water allowance: • Fresh water allowance ...
24) Angle of Loll: • Angle of Loll calculat...
25) Calculate centroid using Simpson’s Rules: • Using Simpson's Rules ...
26) Curve of Statical Stability: • Curve of Statical Stab...
27) Cross Curves of Statical Stability: • Cross Curves of Static...
28) KN curves: • Using KN Curves to con...
29) Trim Problems (Part 1): • Trim Problems (Part 1)...
30) Trim Problems (Part 2): • Trim Problems (Part 2)...
31) Trim Problems (Part 3): • Trim Calculations - P...
![[DOKKAN BATTLE] August Producer's Letter](http://i.ytimg.com/vi/JUTYpaV_4Ic/mqdefault.jpg)
Beautifully simplified ! Thank you Sir ! 🙏
Thanks a lot sir to share
Hi friends
For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna
Gm, sir appreciate for all your vedio, please make some series for ROR situation in RV.. Thanks in advance.
Rushikesh Mayekar thanks Rushikesh. Will try and make a video soon
Hi friends
For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna
Sir can you upload bilge mid compartment stability’s calculation
Hi friends
For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna
kindly post a video for non tanker people tanker operation video like how to commence inerting ? how to star crude oil washing inter gas operation during loading and discharging? inert gas system how it works and principle of odmc as per annex one ? these topics have been always confusing
Noted:)
@@SteeringMariners thank you sir
When I was examined, I have been told that I do not have Ballast tanks, how do I correct the angle of loll then? Or is it a dead-end question that has no answer if you have no ballast tanks?
No, its not really a dead-end question:) You can use cargo to correct angle of loll but the process is much trickier and difficult to achieve at sea. Ballast is easier to shift and adjust (also faster) in sea and in port and hence its the first choice when it comes to using it for correcting angle of loll.
The key thing to remember is that our aim is to lower the Centre of Gravity (G) which can be achieved with cargo or by ballast.
With cargo, you can shift or jettison or discharge if required.
@@SteeringMariners if I would to ask you to show me on a sketch, how would you move the cargo, it still would be specific to the cargo and a ship. Or is there general pattern?
Hi friends
For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna
And Sir if possible kindly enlighten us over the different rollings we get to see on-board and the reasons behind and also the terms like encounter period and all related to it,tried to understand viewing different videos but all seemed a bit incomplete to make it understandable!
will work on it for sure:)
I guess im asking the wrong place but does anyone know a tool to get back into an instagram account..?
I somehow forgot the account password. I would appreciate any help you can offer me.
@Cayson Arlo instablaster :)
@Mitchell Russell i really appreciate your reply. I got to the site on google and I'm in the hacking process atm.
Looks like it's gonna take quite some time so I will get back to you later when my account password hopefully is recovered.
@Mitchell Russell It did the trick and I finally got access to my account again. Im so happy:D
Thank you so much, you saved my account!
hello sir ..
what difference does it makes if we ballast the lower side tank first or the higher side. in both the cases as we are ballasting, so anyhow the 'g' would come down in both the cases, the why specifically the lower side .
sir i am having this doubt .. please explain this, i am having exam next week ...
thank you ..
Correct me !.. If I'm wrong ? But ! I presume the main reason for filling the lower side tanks first is to create a gradual process in bringing down the centre of gravity to a positive "GM" avoiding the possibility of sudden winds n waves causing an instantaneous flopping over to the opposite side effecting shift of cargo which could lead to capsizing of the vessel ?
Hi friends
For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna
Kindly confirm that the lower side is preferred over the centre tanks if available with same moment of area ,or here the consideration has been done with centre tank with more moment of area,leading to the choice of lower tanks,since we are advised to firstly fill in the centre tanks and then go for lower side tanks,Kindly clear the case and so my understanding over it ?
Nabajyoti....its more complex than that. Practically, we start filling the tanks with 2 main objectives: Reduce the FSC or Increase the GM (making it positive). Increasing the GM will give us more positive righting lever to correct the angle of loll.
You start with tanks with low moment of inertia because the resulting FSC will also be low. At the same time, we aim for lower tanks to bring G down and make GM positive.
Or you can top up tanks with high MOI to reduce the FSC.
The behaviour of the vessel with any of the actions has to be observed. Sometimes, it may be more than 1 tank.
However, we can't generalise and assume than center tanks need to be filled first or later.
Hi friends
For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna