12                                FREEBOARD

Objective:- The purpose of this section is to ensure that all vessels are assigned a freeboard in accordance with ICLL 1966. This section also outlines the requirements for draught marks to enable trim to be readily calculated.

12.1                  General

12.1.1               The freeboard for the vessel and its marking should be approved by the Assigning Authority for the assignment of freeboard and issue of the International Load Line Certificate (1966).

12.1.2               Vessels should comply with ICLL for the assignment of a freeboard mark which corresponds to the deepest loading condition included in the stability information booklet for the vessel.

12.1.3               The freeboard assigned should be compatible with the strength of hull structure, intact and damage stability requirements for the vessel, and is to ensure minimum bow height requirements are met.

12.1.4               The Assigning Authority should provide the owner(s)/managing agent(s) of the vessel with a copy of the particulars of the freeboard assigned and a copy of the record of particulars relating to the conditions of assignment.

12.2                  Freeboard Mark and Loading

12.2.1               The freeboard mark applied should be positioned port and starboard at amidships in the load line length and may be an all-seasons mark. The mark should be a permanent disc and be of contrasting colour to the hull of the vessel in way of the mark.

12.2.2               The fresh water freeboard allowance should be obtained by deducting from the all-seasons freeboard assigned, the quantity

                                                  millimetres

                        where-            

                        is the displacement in salt water in tonnes at the all-seasons draught

            T represents tonnes per centimetres immersion at the all seasons load waterline

                        Alternatively the deduction may be taken as 1/48th of the all-seasons draught of the ship at amidships.

12.2.3               A vessel should not operate in any condition which will result in its appropriate freeboard marks being submerged when it is at rest and upright in calm water.

12.3                  Datum Draught Marks

12.3.1               Datum draught marks should be provided at the bow and stern, port and starboard, a nd be adequate in number for assessing the condition and trim of the vessel. Such draught marks may be single datum lines.

12.3.2               The marks should be permanent and easily read but need not be of contrasting colour to the hull.   The marks need not be at more than one draught at each position but should be above and within 1000mm of the deepest load waterline.

12.3.3               The draught to which marks relate should be indicated either above the mark on the hull and/or in the stability information booklet for the vessel. The position of the marks should be verified at initial placement by the Administration or the vessel's Assigning Authority.

English Certificates - Sommaire - Suite