Deadweight Scale

In order to complete a Trim and Stability booklet for submission to the Regulatory Authorities and the vessel's owners, a deadweight table and scale is generally required. The output from Calc is available in both graphical & tabulated format.

In order to produce a deadweight scale you can edit the 'Form Calculations - Deadweight Scale' node and ensure that all input data is complete and current. The deadweight is determined by subtracting the lightship weight from the displacement. you should be aware that the lightship weight that is specified on the associated input dialog is used for this purpose, as opposed to the possibly different weight value from the Lightweight Definition dialog as employed under Loading Conditions.

The deadweight scale data that is produced, extends from the lightship draft to a draft equal to the summer draft + summer freeboard. By definition, the freeboard at the latter is zero. The particulars calculated at each draft are:

• Salt and fresh water displacement,

• Salt and fresh water deadweight,

• Variable deadweight (from density = 1.0 (freshwater) to the input density)

• Freeboard,

• TPI,

• MCT.

The graphical representation of the deadweight scale can be modified to reorder the positions of the different scales and to select a right or left scale (or both).