Hydrostatics Dialog

Hydrostatics Dialog.

As with the other dialogs, the default title is the node/icon name and if you change the title then the node name in the Application Tree is changed accordingly. As this dialog only allows for a single heel and trim condition, then if more than one heel/trim combination is to be studied then you will need to add more nodes, at this level, and individually title each accordingly.

The dialog initially displays a list of drafts, in ascending order of depth, which is automatically created by Calc based on the principal dimensions of the hull form as contained in the input hull geometry model. (It is to be noted that the output report pages will contain the vessel’s various Principal Particulars and you can refer to these if he requires any information and/or clarification.) you can either accept the full list of drafts or he can select only those that he wishes to use in the subsequent hydrostatic calculations. A selected draft can be removed by clicking the Delete button or alternatively the right-hand button on the mouse and selecting the delete draft command from the sub-menu that is then presented. Other drafts can be similarly added to the list, by clicking the Add button, or alternatively the right-hand button on the mouse and selecting the add draft command, and associated simple dialog.

If the Output Table box is checked, then the program will output a Displacement table, which gives the displacement at the given drafts for the specified water densities.

You can elect to base the hydrostatic calculations on the moulded hull form, or can allow for the average shell plate thickness by inputting an estimated value. If you considers that the hull girder is likely to be sufficiently flexible as to effect the hydrostatics property calculations, then he can input an estimated value for the midship vertical bending deflection, with a positive value indicating a hogging condition and a negative value indicating a sagging condition. If you wish to use the extreme draft in the calculations, then he sets the Extreme switch and inputs an estimated keel plate thickness.

Clicking either the Waves... or the Axis Shift... buttons within this dialog box results in you being presented with dialog boxes of the same name and that are the same as described earlier in Ship Data Dialog. you can use these dialogs in order to change the input data, from that given in the Ship Data input, and to be locally used for the calculations that are undertaken within this function.