Question about Squat vs Block Coefficient

[beej67]

https://www.myseatime.com/blog/deta...elp-in-understanding-of-squat-effect-on-ships

Block coefficient is defined as the volume of the ship displacement at present draft, divided by the volume of a rectangular block encapsulating the vessel at that same draft.

Squat is then calculated as a function of block coefficient.

Question:

Wouldn't squat affect the "present draft" of the vessel, thereby changing the block coefficient?

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East -

http://www.campbellcivil.com

 

[GregLocock]

I've always assumed the depth at mid length would be the relevant depth for block coefficient. That formula for squat looks too good to be true, I suspect it only applies to a subset of hull shapes.

Cheers

Greg Locock


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[beej67]

Even presuming the formula works, though, doesn't the squat increase the draft?

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East -

http://www.campbellcivil.com

 

[GregLocock]

Ah, got it, thought you just meant the effect on block coefficient. I'd guess that that is already accounted for in the equation, but it is a guess.

Cheers

Greg Locock


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