Thank you for taking time and effort sharing your knowledge. It improves mine difinitely. You filled up the bathtub for it and that effort did not escape me. Thanks.
I like to contribute towards an understanding of the water planing area you pointed to, if I may. So it is the wetted area of the hull's external 'skin' in contact with the water as it changed in shape in tandem with the movement of the vessel underway. And not the resultant cross-sectional profile as one would conceptually, as if, standing on it inside the boat. I need the clarification myself because I could have misunderstood the cardboard cut-out demonstration at one point of you video. Hope you can clarify this. Thanks again for a great video instruction.
Hi Joseph. The AWP (area of the waterplane) has no relevance to wetted surface area of the hull. Also - the concept of AWP should not be complicated by weather the vessel is underway (making way) or not. The vessel may be stationary! The AWP is the 2 dimensional shape of the hull at the waterline, as viewed from above (or below for that matter). It is a symmetrical shape when the vessel is upright, but usually will become asymmetrical as the vessel heels to one side. Imagine taking a "slice" through the hull, about 1cm thick, at the waterline. The area of that slice is the AWP, and the geometric centre of that shape is the LCF (Longitudinal Centre of Floatation)
@@josephlai9759 Just one more thing - if there is little or no freeboard on the vessel (for example it is overloaded) then the AWP cannot extend outwards as the vessel heels and the deck becomes immersed. The righting moment is compromised and stability is greatly reduced. This is why the AWP and Freeboard should be seen as associated concepts. Best of luck with your studies, and keep watching for a new series on stability soon from me. Thank you for subscribing.
Very well explained.
Thanks for your efforts. Helps me in teaching in maritime institution.
Loved your knowledge 💙 Thank you
GREAT STUFF! Should be required viewing for all mariners...every single one!
Legend mate
Thank you for taking time and effort sharing your knowledge. It improves mine difinitely. You filled up the bathtub for it and that effort did not escape me. Thanks.
Thanks Joseph! A bath tub did seem appropriate for this particular subject....
Great contribution sir...
I like to contribute towards an understanding of the water planing area you pointed to, if I may. So it is the wetted area of the hull's external 'skin' in contact with the water as it changed in shape in tandem with the movement of the vessel underway. And not the resultant cross-sectional profile as one would conceptually, as if, standing on it inside the boat. I need the clarification myself because I could have misunderstood the cardboard cut-out demonstration at one point of you video. Hope you can clarify this. Thanks again for a great video instruction.
Hi Joseph. The AWP (area of the waterplane) has no relevance to wetted surface area of the hull. Also - the concept of AWP should not be complicated by weather the vessel is underway (making way) or not. The vessel may be stationary! The AWP is the 2 dimensional shape of the hull at the waterline, as viewed from above (or below for that matter). It is a symmetrical shape when the vessel is upright, but usually will become asymmetrical as the vessel heels to one side. Imagine taking a "slice" through the hull, about 1cm thick, at the waterline. The area of that slice is the AWP, and the geometric centre of that shape is the LCF (Longitudinal Centre of Floatation)
@@waterbornemarinepublicatio8697 Thank you so much! Learned another new thing.
@@josephlai9759 Just one more thing - if there is little or no freeboard on the vessel (for example it is overloaded) then the AWP cannot extend outwards as the vessel heels and the deck becomes immersed. The righting moment is compromised and stability is greatly reduced. This is why the AWP and Freeboard should be seen as associated concepts. Best of luck with your studies, and keep watching for a new series on stability soon from me. Thank you for subscribing.
Nice video, thanks for the easy to understand information.
Thank you Prasad.
Could you show how to do draft and trim calculations?
Sorry I missed this comment Ryan. I have a new playlist soon dealing with trim and draft changes.