RULES FOR CLASSIFICATION Inland navigation vessels Edition December 2015 Part 6 Additional class notations Chapter 5 Stability The content of this service document is the subject of intellectual property rights reserved by DNV GL AS ("DNV GL"). The user accepts that it is prohibited by anyone else but DNV GL and/or its licensees to offer and/or perform classification, certification and/or verification services, including the issuance of certificates and/or declarations of conformity, wholly or partly, on the basis of and/or pursuant to this document whether free of charge or chargeable, without DNV GL's prior written consent. DNV GL is not responsible for the consequences arising from any use of this document by others. The electronic pdf version of this document, available free of charge from http://www.dnvgl.com, is the officially binding version. DNV GL AS FOREWORD DNV GL rules for classification contain procedural and technical requirements related to obtaining and retaining a class certificate. The rules represent all requirements adopted by the Society as basis for classification. © DNV GL AS December 2015 Any comments may be sent by e-mail to [email protected] If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of DNV GL, then DNV GL shall pay compensation to such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that the maximum compensation shall never exceed USD 2 million. In this provision "DNV GL" shall mean DNV GL AS, its direct and indirect owners as well as all its affiliates, subsidiaries, directors, officers, employees, agents and any other acting on behalf of DNV GL. CHANGES – CURRENT t n e r This is a new document. r u The rules enter into force 1 July 2016. c - s e g n a h C 5 r e t p a h C 6 t r a P Rules for classification: Inland navigation vessels — DNVGL-RU-INV-Pt6Ch5. Edition December 2015 Page 3 Stability DNV GL AS s t CONTENTS n e t n Changes – current...................................................................................................... 3 o C Section 1 Stability...................................................................................................... 5 5 1 Symbols.................................................................................................. 5 r 2 General................................................................................................... 5 e t 3 Tankers...................................................................................................8 p a 4 Container vessels....................................................................................8 h 5 Dredgers and pontoons........................................................................ 14 C 6 Vessels carrying bulk dry cargo............................................................17 6 t r a P Rules for classification: Inland navigation vessels — DNVGL-RU-INV-Pt6Ch5. Edition December 2015 Page 4 Stability DNV GL AS SECTION 1 STABILITY 1 n o 1 Symbols i t L = rule length [m] defined in Pt.3 Ch.1 Sec.1 [1] c LWL = length of the hull [m] measured at the maximum draught e = breadth [m] [m] defined in Pt.3 Ch.1 Sec.1 [1] S B D = depth [m] [m] defined in Pt.3 Ch.1 Sec.1 [1] 5 T = draught [m] [m] defined in Pt.3 Ch.1 Sec.1 [1] r = displacement of the laden vessel [t] Δ e v = maximum speed of the vessel in relation to the water [m/s] t KG = height [m] of the centre of gravity above base line p n = navigation coefficient defined in Pt.3 Ch.3 Sec.1 a = 0.85 · H h C H = significant wave height [m] CB = block coefficient 6 t r 2 General a P 2.1 Application 2.1.1 Vessels complying with the requirements of this section are eligible for the assignment of one of the following additional Class Notations, as defined in Pt.1 Ch.2 Sec.2 [9.4]: — Intact stability — Damage stability 2.2 Definitions 2.2.1 Plane of maximum draught Plane of maximum draught is the water plane corresponding to the maximum draught at which the vessel is authorized to navigate. 2.2.2 Bulkhead deck Bulkhead deck is the deck up to which the required watertight bulkheads are carried and from which the freeboard is measured. 2.2.3 Freeboard (F) Freeboard is the distance between the plane of maximum draught and a parallel plane passing through the lowest point of the gunwale or, in the absence of a gunwale, the lowest point of the upper edge of the vessel's side. 2.2.4 Residual freeboard Residual freeboard is the vertical clearance available, in the event of the vessel heeling over, between the water level and the upper surface of the deck at the lowest point of the immersed side or, if there is no deck, the lowest point of the upper surface of the vessel's side shell. 2.2.5 Safety clearance Safety clearance is the distance between the plane of maximum draught and the parallel plane passing through the lowest point above which the vessel is no longer deemed to be watertight. Rules for classification: Inland navigation vessels — DNVGL-RU-INV-Pt6Ch5. Edition December 2015 Page 5 Stability DNV GL AS 2.2.6 Residual safety clearance 1 Residual safety clearance is the vertical clearance available, in the event of the vessel heeling over, between the water level and the lowest point of the immersed side, beyond which the vessel is no longer regarded as n o watertight. i t 2.2.7 Weathertight c Weathertight is the term used to describe a closure or structure which prevents water from penetrating into e S the vessel under any service conditions. Weathertight designates structural elements or devices which are so designed that the penetration of water into the inside of the vessel is prevented: 5 — for one minute when they are subjected to a pressure corresponding to a 1 m head of water, or r e — for ten minutes when they are exposed to the action of a jet of water with a minimum pressure of 1 bar in t all directions over their entire area p a Following constructions are regarded as weathertight: h C — weathertight doors complying with ISO 6042 — ventilation flaps complying with ISO 5778 6 — airpipe heads of automatic type and of approved design t r Weathertightness shall be proven by hose tests or equivalent tests accepted by the Society before installing. a P 2.2.8 Watertight Watertight designates structural elements or devices which meet all the conditions stated for weathertightness and also remain tight at the anticipated internal and external pressure. Watertightness shall be proven by workshop testing and where applicable by type approvals in combination with construction drawings (e.g. watertight sliding doors, cable penetrations through watertight bulkheads). 2.2.9 Light ship The light ship is a vessel complete in all respects, but without consumables, stores, cargo, and crew and effects, owners’ supply and without liquids on board except for machinery and piping fluids, such as lubricants and hydraulics, which are at operating levels. 2.2.10 Inclining test The inclining test is a procedure which involves moving a series of known weights, normally in the transverse direction, and then measuring the resulting change in the equilibrium heel angle of the vessel. By using this information and applying basic naval architecture principles, the vessel’s vertical centre of gravity (VCG or KG) is determined. 2.3 Documents to be submitted for approval and for on board use 2.3.1 Documents to be provided on board The following information shall be provided on board the vessel and shall be prepared in a clear and understandable format as a working document for the master. — general description of the vessel — general arrangement and capacity plans indicating the assigned use of compartments and spaces (cargo, passenger, stores, accommodation, etc.) — a sketch indicating the position of the draught marks referred to the vessel’s perpendiculars — hydrostatic curves or tables corresponding to the design trim, and, if significant trim angles are foreseen during the normal operation of the vessel, curves or tables corresponding to such range of trim shall be introduced — cross curves or tables of stability calculated on a free trimming basis, for the ranges of displacement and trim anticipated in normal operating conditions, with indication of the volumes which have been considered buoyant — tank sounding tables or curves showing capacities, centres of gravity, and free surface data for each tank Rules for classification: Inland navigation vessels — DNVGL-RU-INV-Pt6Ch5. Edition December 2015 Page 6 Stability DNV GL AS — light ship data from the inclining test, including light ship displacement, centre of gravity co-ordinates, 1 place and date of the inclining test, as well as the Society approval details specified in the inclining test report. It is suggested that a copy of the approved test report be included n o Where the above-mentioned information is derived from a sister ship, the reference to this sister ship i shall be clearly indicated, and a copy of the approved inclining test report relevant to this sister ship shall t c be included e — standard loading conditions and examples for developing other acceptable loading conditions using the S information contained in the trim and stability booklet 5 — intact stability results (total displacement and its centre of gravity co-ordinates, draughts at perpendiculars, GM, GM corrected for free surfaces effect, GZ values and curve, criteria reporting r e a comparison between the actual and the required values)