3.4 Hydrostatic particulars

  3.4.1 Hydrostatic particulars should be presented for the ship on even keel or design trim without deflection in a table against draught to the bottom of keel over a range from light ship to 115% of the maximum draught or to the depth of hull, whichever is less.

 The tabulated intervals should be not greater than 5 cm. Values should be rounded to decimal places shown below.

  3.4.2 The tabulated values should include:

 Instead of MTM, the values of MTC may be used (see subsection 2.2). The position of reference planes should be confirmed for KM, XB and XF.

  3.4.3 Where the operation of the ship results in loading conditions having significant trim, i.e. trim exceeding 0.01 @ L, additional hydrostatic particulars should be prepared for a suitable range of trim.

This applies in particular to the z - co-ordinate of the metacentre KM which should be given for ships where stability may become critical due to cargo stowage pattern. The following presentations should be used, if appropriate:

  3.4.4 Cross curve data should be provided for the same conditions as lined out under 3.4.1 for heeling angles from 10° to 80° at 10° intervals. Closer spacing or particular angles may be required for certain ships or special purposes, e.g. grain stability.

Where the operating trim or the form and arrangement of the ship are such that change in trim has an appreciable effect on righting arms, additional cross curve tables should be included for a suitable range of trim. A statement should be appended to the table indicating the erections and/or timber deck loads which are included in the cross curve values.