SECTION 1 - Boat Design Net

Pt B, Ch 3, Sec 1SECTION 1GENERAL REQUIREMENTS1 General1.1 Application1.1.1 GeneralAll yachts may be assigned class only after it has been demonstratedthat their stability is adequate. Adequate stabilitymeans compliance with standards laid down with therequirements specified in the relevant chapters taking intoaccount the yacht’s size and type. See Tab 1.1.1.2 Approval of the AdministrationEvidence of approval by the Administration concerned maybe accepted for the purpose of Classification, if demonstratedthat their requirements are at least equal to thosedefined in the relevant chapter of these rules.2 Examination procedure2.1 Documents to be submitted2.1.1 List of documentsFor the purpose of the examination of the stability, the followingdocuments are to be submitted:• lines plan• general arrangement plan. In addition for sailing yachts,a general arrangement plan showing the sails loweredon the rigging and masts• capacity plan indicating the volume and position of thecentre of gravity (coordinates X, Y, Z), of all compartmentsand tanks and the free surfaces• hydrostatic tables or curves• lightship particulars• trim and stability booklet• when applicable, damage stability calculations.LengthTable 1 : ApplicationShelteredareaNavigation notationCoastalareaUnrestrictednavigationL LL ≤ 24m Ch 3, Sec 2 Ch 3, Sec 2 Ch 3, Sec 2L LL > 24m Ch 3, Sec 2 Ch 3, Sec 2Ch 3, Sec 2andCh 3, Sec 3 (1)(1) May be exempted from damage stability for yacht havingthe navigation notation unrestricted navigation limitedto 60 nautical miles.2.1.2 Documents for approvalThe report of the inclining experiment, the trim and stabilitybooklet and when applicable the damage stability calculationsare to be submitted for approval.2.1.3 Provisional documentationProvisional stability documentation based on the estimatedlightship particulars should be submitted for examination.2.1.4 Final documentationFinal stability documentation based on the results of theinclining experiment or the lightweight check is to be submittedfor examination.When the difference between the estimated values of thelightship and those obtained from the inclining experimentor the lightweight check is less than:• 2% for the displacement and• 1% of the length between perpendiculars for the longitudinalposition of the centre of gravityand the determined vertical position of the centre of gravityis not greater than the estimated vertical position of the centreof gravity, the provisional stability documentation maybe accepted as the final stability documentation.2.2 Inclining experiment/lightweight check2.2.1 DefinitionsThe following definitions are used in the present Chapter:a) LightshipThe lightship is a yacht complete in all respects, butwithout consumable, stores, and crew and effects, andwithout any liquids on board except for machinery andpiping fluids, such as lubricants and hydraulics, whichare at operating levelsb) Inclining experimentThe inclining experiment is a procedure which involvesmoving a series of known weights, normally in thetransverse direction, and then measuring the resultingchange in the equilibrium heel angle of the yacht. Byusing this information and applying basic naval architectureprinciples, the yacht’s vertical centre of gravity(VCG or KG) is determinedJuly 2006 with February 2008 Amendments Bureau Veritas Rules for Yachts 87