very importan need tocalculate cross curve of stability KN

[s3dany]

I have lines forship it's supply vessel and i want to get KN curves of stability. I got the hydrostatic curves for the ship and calculate Kn curves up to 25 degree by wall sided formula and i found there is error for angle more than 25 degree so iwant to know howto caculate KN curves

[Guillermo]

Hi s3dany, welcome to these forums!
As it is too tough to perform such calculations by hand, I'd suggest you to use a NA program, like Delftship or any other available in the market.

Cheers.

[s3dany]

thank u very much for answer me i download demo version and try it now but i want to ask if it give accurate results or i have to buy fullversion

[Guillermo]

dany,
As far as I know it is accurate. The differences with the paying version is clearly stated at Delftship's pages.
Cheers.

[s3dany]

thank you very much i try freeship now but iwant ask u ifu have tutorial to make a offset file i try to do it but i don't understand it from manual. i need to know what he mean from following:
1)Distance of aft contour line to origin on each waterline. doeshemaean distance from the outer line in profile to orgin.
2)The last column represents the height of the contour line on each station. and wht does it mean buttock or something else i didn't get it.

there is somethinmg how i can get hydrostatic data bcz when i goview then hydrostatic they give me table but always parameter contain 0 except draft so howi can use it to get hydrostatic and cross curves bcz that wht i need

[Guillermo]

s3dany,
I'm not used to work with Delftship.
You should post your questions in the Software section of these forums.
Best.