When Delftship produces a tank sounding table for a rectangular tank the values in the FSM column do not reduce as the ullage approaches zero. This suggests that the program does not account for pocketing as a full tank should have zero FSM.
I have read that accounting for pocketing can reduce predicted FSM by about 25%. This can make the difference between ‘passing’ or ‘failing’ a small vessel with wide tanks in the maximum loaded departure condition so I’d like to be as accurate as possible.
Is there some setting I haven’t found to get Delftship to account for pocketing, some other way to factor it in or, does anyone know, any plans to add this feature to future versions?
Pocketing is indeed not accounted for because as far as I know this is not allowed according to the regulations. Or do you have an example where it is allowed?