RULES FOR CLASSIFICATION Naval vessels. Part 1 Classification and surveys Chapter 3 Class notations. Edition December 2015 DNV GL AS

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1 RULES FOR CLASSIFICATION Naval vessels Edition December 2015 Part 1 Classification and surveys Chapter 3 The content of this service document is the subject of intellectual property rights reserved by ("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 is the officially binding version.

2 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. December 2015 Any comments may be sent by to rules@dnvgl.com 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, 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.

3 CURRENT CHANGES This is a new document. The rules enter into force 1 July Part 1 Chapter 3 Changes - current Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 3

4 CONTENTS Current changes...3 Section General... 5 Section 2 Construction symbol and character of classification Construction symbols Characters of classification...6 Section Ship type notations... 7 Section 4 Additional class notations Additional class notations Additional class notations for special military requirements Service area restrictions...16 Part 1 Chapter 3 Contents Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 4

5 SECTION 1 CLASS NOTATIONS 1 General 1.1 Introduction All vessels classed with the Society may be assigned construction symbol character of classification ship type notation additional class notation service area notation as applicable are assigned in order to determine applicable rule requirements for assignment and retention of class. Applicable class notations are given in this section. Part 1 Chapter 3 Section are either mandatory or optional. The mandatory class notations are indicated in Sec.2 to Sec Optional class notations from the Society's other rule books may, upon special consideration, be assigned to a vessel complying with those rules may be given one or more qualifiers which are supplementary symbols used to identify variants of the class notation or a design parameter. Qualifiers typically denote differences in levels of complexity and/or special requirements or limitations, and may be assigned additional requirements. Qualifiers follow immediately after a class notation and are indicated in parenthesis. Multiple qualifiers are separated by comma and space and qualifiers are shown in bold. See [1.1.8] for examples of class notations and qualifiers The tables in this section include the following information Name of class notation Indication of class notation being mandatory Reference to design requirements Qualifiers as relevant Intended purpose for class notation Application, giving information on when and where the class notation can be applied and/or in what condition a class notation is mandatory The following are examples of class designations for naval ships: 1A N Frigate RSD SFP CM NBC DEG 1A N Corvette NAUT 1A N Submarine Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 5

6 SECTION 2 CONSTRUCTION SYMBOL AND CHARACTER OF CLASSIFICATION 1 Construction symbols 1.1 General The construction symbol will be assigned to vessels built under the supervision of the Society The construction symbol will be assigned to vessels built under the supervision of a classification society recognized by the Society and later assigned class with the Society. For such vessels the class notations which the Society considers to have the equivalent intent will be assigned Vessels other than those described in [1.1.1] and [1.1.2] will not be assigned a construction symbol when classed with the Society. 2 Characters of classification Part 1 Chapter 3 Section General The character of classification 1A N will be assigned to vessels with hull, machinery, systems and equipment found to be in compliance with applicable rule requirements as given in Pt.2, Pt.3 and Pt The character of classification 1A N will also be assigned to vessels designed and constructed in accordance with the rules of another classification society, and later assigned class with the Society. Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 6

7 SECTION 3 CLASS NOTATIONS 1 Ship type notations 1.1 General Vessels that comply with relevant requirements will be assigned a ship type notation as indicated in Table 1. Table 1 Ship type notation for naval ships Aircraft carrier Mandatory: Yes Class Notation Qualifier Purpose Application Design requirements: Pt.3 Ch.5 Sec.23 <None> Naval ship carrying different types of aircraft, and operating with a flight deck, hangar. Large naval ship with a displacement greater than tons. Part 1 Chapter 3 Section 3 Cruiser Mandatory: Yes Design requirements: Pt.3 Ch.5 Sec.23 <None> Naval ship which is capable to develop control commanding tasks and mainly sea and air in a mission theatre at the same time. Large naval ship with a displacement greater than 5000 tons. Amphibious warfare ship Mandatory: Yes Design requirements: Pt.3 Ch.5 Sec.22 <None> Naval ship which is capable to operate mainly helicopter and landing craft at the same time, the latter often via stern dock. Large naval ship with a displacement greater than 5000 tons. Destroyer Mandatory: Yes Design requirements: Pt.3 Ch.5 Sec.22 <None> Naval ship which is capable to develop at least two control tasks at the same time. Large naval ship with a displacement greater than 4000 tons. Frigate Mandatory: Yes Design requirements: Pt.3 <None> Naval ship which is capable to develop sea, air, or submarine control alternatively. Medium size naval ship with a displacement greater than 1500 tons. Corvette Mandatory: Yes Design requirements: <None> Naval ship which is capable to undertake limited missions. Small size naval ship with a displacement below 1500 tons. Pt.3 Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 7

8 Mine warfare vessel Mandatory: Yes Design requirements: Pt.3 Submarine Mandatory: Yes Design requirements: Pt.4 Ch.1 <None> <None> Naval ship which is capable of executing mine countermeasures, mine hunting and mine laying. Manned underwater naval ship with the ability to perform military missions Where the intended duties of the ship include support functions which may be described by notations also used for commercial and/or state-operated non-military craft, such notations may be assigned instead of or in addition to the notations referred to under [2.1], see RU SHIP Pt.1 Ch.2. Guidance note: This is applicable also in the case that the ship is armed, e.g. for defence purposes; regarding inclusion of weapons/military systems in the classification procedure, see Ch.2 Sec.1 [1.3] and Ch.2 Sec.1 [1.4]. Part 1 Chapter 3 Section 3 ---e-n-d---of---g-u-i-d-a-n-c-e---n-o-t-e High speed craft HSC-N Special ship types such as catamarans, SWATH, hydrofoil craft, surface effect ships and air cushion vehicles are designed in accordance with the Rules for Classification of HSLC. HSDE Notation for craft which have been constructed by using elements of Rules for Classification of HSLC and which are not subject to the IMO HSC Code. Details regarding rule application are specified in the class Certificate. Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 8

9 SECTION 4 ADDITIONAL CLASS NOTATIONS 1 Additional class notations 1.1 Special considerations for hull structures The notations defined in Table 1 may be applied to the hull of naval surface ships. Table 1 Additional notations for hull structures SDS Higher strength hull structural steel, Aluminum, FRP For the hull proof of subdivision and damage stability has been furnished If other materials than normal strength hull structural steel are employed for the hull, this shall be indicated in the class certificate. Material selection, design, dimensioning and manufacturing of hull structures made of FRP shall be agreed case by case with the Society. Pt.3 Ch.1 Sec.2 [3] Pt.3 Ch.1 Sec.3 Part 1 Chapter 3 Section 4 RSD RSM SFP BIS COLL Special analysis procedures are applied including: first principle design procedures by means of e.g. finite element analysis techniques additional fatigue strength calculations calculation of usage factors and assessment of highly stressed structures determination of explicit corrosion margins of structural members The analysis results will be stored in a date base. The construction of the hull fulfils the requirements for residual strength following a defined extent of structural damage due to military effects. Additional requirements concerning fire-resisting divisions, combustible materials, ventilation, etc. are applied. The ship s hull is specially equipped for in-water surveys, i.e. surveys of the underwater part carried out in floating condition instead of dry docking. Fixed markings and inscriptions are not required, but means for the diver to determine his respective position shall be in place. Ships, the side structure of which are specially strengthened on order to resist collision impacts. Pt.3 Ch.1 Sec.4 Pt.3 Ch.1 Sec.21 Pt.3 Ch.1 Sec.20 RU SHIP Pt.6 Ch.9 Sec.1 RU SHIP Pt.6 Ch.1 Sec.10 Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 9

10 1.2 Ice strengthening Ships, which comply with the requirements of RU SHIP Pt.6 Ch.6 Sec.1 relating to strengthening for navigation in ice, may be assigned the class notation Ice(E) Ships, which comply with the requirements of RU SHIP Pt.6 Ch.6 Sec.2 relating to strengthening for navigation in ice in accordance with the Finnish- Swedish Ice Class Rules, may be assigned one of the notations Ice(1A*), Ice(1A), Ice(1B) or Ice(1C) Ships, which comply with the requirements of RU SHIP Pt.6 Ch.6 Sec.5 relating to strengthening for navigation in ice-infested polar waters, may be assigned the class notation PC, with relevant qualifier Ships, which comply with the requirements of RU SHIP Pt.6 Ch.6 Sec.3 relating to operations in cold climate, may be assigned the class notation Winterized, with relevant qualifier. Guidance note: For navigation in the arctic waters of Canada reference is made to the requirements of the Canadian "Arctic Shipping Pollution Prevention Regulations", October The Society is authorised to issue the relevant"arctic Pollution Prevention Certificate". Part 1 Chapter 3 Section 4 ---e-n-d---of---g-u-i-d-a-n-c-e---n-o-t-e Fuel cell installations Naval ships designed with fuel cell system in accordance with relevant requirements in RU SHIP Pt.6 Ch.2 Sec.3 may be assigned the class notation FC, with relevant qualifier. 1.4 Automation Machinery installations which comply with the rules of the Society for automated and/or remotecontrolled systems, will have the notations specified in Table 2 affixed to the character of classification (not applicable if class notations for high-speed craft have been assigned). Table 2 Notations for machinery with automated or remote controlled systems E0 RC The machinery installation is fitted with equipment for unattended machinery spaces, so that it does not require to be operated and/or maintained for periods of at least 24 hours. Small naval vessels with a length L 48 m are provided with a system for remote control of the main propulsion plant from the navigation bridge. RU SHIP Pt.6 Ch.9 Sec.5. Pt.3 Ch.4 Sec.2 [3]. 1.5 Redundant propulsion and steering systems Naval ships with propulsion and steering systems which meet the redundancy requirements of RU SHIP Pt.6 Ch.2 Sec.2 may be assigned the class notation RP, with relevant qualifier. Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 10

11 1.6 Dynamic positioning systems Naval ships designed with dynamic positioning system in accordance with relevant requirements in RU SHIP Pt.6 Ch.3 may be assigned one of the class notations DYNPOS or DPS, with relevant qualifier. 1.7 Tailshaft monitoring Naval ships designed with tailshaft monitoring in accordance with relevant requirements in RU SHIP Pt.6 Ch.9 Sec.5 may be assigned the class notation TMON. 1.8 Bridge design Ships, designed in accordance with RU SHIP Pt.6 Ch.3 Sec.3 relating to bridge design, bridge instrumentation and workstation arrangements, may be assigned the class notation NAUT, with relevant qualifier. Part 1 Chapter 3 Section Towing arrangements Naval ships which are equipped with towing equipment like towing winches or warping capstans, towing lines or towing hooks, etc. according to the requirements specified in Pt.3 Ch.5 Sec.5 [4] and Pt.3 Ch.1 Sec.18 and Pt.3 Ch.3 Sec.16, may be assigned the class notation TOW Carriage of dangerous goods Naval ships equipped for the carriage of dangerous goods in packaged form according with the RU SHIP Pt.6 Ch.5 Sec.10, may be assigned the class notation DG Ambient conditions and environmental standards Ambient conditions Where more severe ambient conditions are expected by the naval administration, one of the two notations defined in Table 3 may be assigned Environmental standards Clean and BWM are defined in Table 3. Table 3 ambient conditions and environmental standards AC1 (Ambient Conditions 1) The parameter for ship inclination, for ship movement and the limit conditions are increased against the standard requirements. Pt.3 Ch.1 Sec.1 [1.4] Table 1 and Pt.3 Ch.1 Sec.1 [1.4] Table 2, Pt.3 Ch.5 Sec.1 ACS (Ambient Conditions Special) The special requirements for unusual types and/ or tasks of naval ships are agreed upon case by case. Pt.3 Ch.1 Sec.1 [4].Pt.3 Ch.5 Sec.1 Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 11

12 Clean BMW Stabilization in the seaway SEAKEEP Arrangements for controlling and limiting operational emissions and discharges. Ballast water discharges from ships are prominently responsible for transferring organisms between geographically separated water bodies. BMW serves the purpose of speeding up and simplifying the process of producing a ballast water management plan to optimize the safe operation of the naval ship. RU SHIP Pt.6 Ch.7 Sec.2 RU SHIP Pt.6 Ch.7 Sec.1 Ships designed in accordance with the requirements of Pt.3 Ch.4 Sec.6 [10] relating to reducing the movement (heel, trim and roll), may be assigned the class notation SEAKEEP Application of other rules Part 1 Chapter 3 Section SEA-NH, SEA-NM, SEA-NE, SEA-NQ are defined in Table 4. It shall be specified and agreed with the Society in written form which systems and elements are to be designed, constructed and tested according to the following underlying rules and not according to the Rules for Classification of naval vessels. Table 4 for application of other rule books SEA-NH SEA-NM SEA-NE SEA-NQ The requirements for the ship s hull follow the rules for nonnaval ships. The requirements for the ship s machinery and systems follow the rules for non-naval ships. The requirements for the ships electrical installations and/or automation follow the rules for non-naval ships. The requirements for the ship s equipment follow the rules for non-naval ships. RU SHIP Pt.3 RU SHIP Pt.4 RU SHIP Pt.4 RU SHIP Pt.3 and RU SHIP Pt.4 Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 12

13 2 Additional class notations for special military requirements 2.1 Naval ship code and naval submarine code NSC (Chapter) and NSubC (Chapter) are defined in Table 5. Table 5 Class notation NSC (Chapter) and NSubC (Chapter) NSC (Chapter) NSubC (Chapter) The overall aim of the Naval Ship Code as NATO standard ANEP 77 is to provide a framework for a naval surface ship safety management system. If the requirements of certain Chapters of the NSC are fulfilled, The Society may issue the class notation for the relevant chapter(s). The overall aim of the Naval Submarine Code as NATO standard is to provide a frame-work for a naval submarine safety management system. If the requirements of certain Chapters of the NSubC are fulfilled, the Society may issue the class notation for the relevant Chapter(s). Pt.1 Ch.8, Pt.3 Ch.1 Sec.24, Pt.3 Ch.2 Sec.11, Pt.3 Ch.3 Sec.19, Pt.3 Ch.4 Sec.11, Pt.3 Ch.5 Sec.21 Sec.18 Part 1 Chapter 3 Section Dynamic loads for ability to limit the effects created by dynamic loads of naval ships are specified in Table 6. Table 6 Notations to limit the effect of dynamic loads SHOCK NOISE Designed to withstand shock loads from weapon effects above or below the water surface of a size to be specified by the naval administration. Designed to operate with a defined noise level to be specified by the naval administration. Pt.3 Ch.1 Sec.16 [4]. Pt.3 Ch.1 Sec.16 [2]. VIBR Designed to operate create only a limited influence or vibrations on the fatigue of the hull structures, the mast mounted electronic equipment, etc. and the habitability of the crew. Pt.3 Ch.1 Sec.16 [3]. Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 13

14 2.3 Flight operations The notations for the different abilities to execute flight operations are specified in Table 7. Table 7 Notations for flight operations FO FO (HELIW) FO (HELIL) FO (HELILF) The naval ship is arranged for flight operations for starts and landing of a greater number of different types of aircraft, for which complete service, like refuelling and maintenance, etc. can be performed in a protected hangar. Equipped for helicopter winching operations, landing is not possible. (VERTREP) Equipped with helicopter landing deck. Equipped with helicopter landing deck and refuelling capabilities. Pt.3 Ch.1 Sec.23, Pt.3 Ch.5 Sec.13 Part 1 Chapter 3 Section 4 FO (DRONE) Equipped with drone (UAV) handling capabilities. 2.4 Special notations for military requirements Additional notations for military requirements are specified in Table 8. Table 8 Notations for special military requirements LA (Lifting Appliances) LA (CRANE) RAS NBC DEG (Degaussing) Equipped with classified lifting appliances other than those need in connection with RAS. Equipped with classified lifting appliances like cranes, gantry cranes, A-frames etc. which are able to work up to a certain sea state to be defined by the naval administration. Equipped with installations for the transfer of liquids, such as fuel, oil, water, stores and persons while operating at sea. This notation may be assigned to the supplying ship as well as to the receiving ship. Designed and equipped to meet the requirements for protection within a citadel against the fall-out of nuclear, as well as biological and chemical weapons. Equipped with an active system for degaussing (magnetic self-protection) by means of amplified cable windings in the ship which reduce the magnetic signature. Rules for Ship Operation Installations and Auxiliary Systems Pt.3 Ch.5 Sec.3 Rules for Ship Operation Installations and Auxiliary Systems Pt.3 Ch.5 Sec.4 Rules for Ship Operation Installations and Auxiliary Systems Pt.3 Ch.5 Sec.11 Rules for Electrical Installations Pt.3 Ch.3 Sec.12 [6]. Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 14

15 DI ARM PLT EMC SAM AIP REF Equipped with diving installations for production, bottling and storage of breathing gases. Equipped with special (light weight) armour to protect sensible elements. Special measures are provided for the laying of cables to optimize electromagnetic compatibility. Equipped with special measures to store safely ammunition, missiles, torpedos, etc. with minimized risk for the naval ship. This notation will be issued if the submarine is equipped with an Air Independent Power system based on a closed circuit process which can be used during underwater operation. This notation will be issued if the design of the submarine includes a Refuge Compartment in which the crew can stay and wait for rescue if the pressure hull is partly damaged. Rules for Ship Operation Installations and Auxiliary Systems Pt.3 Ch.5 Sec.18 Rules for Electrical Installations Pt.3 Ch.3 Sec.12 Rules for Ship Operation Installations and Auxiliary Systems Pt.3 Ch.5 Sec.3 [6] and Pt.3 Ch.5 Sec.9 [15]. Pt.4 Ch.1 Sec.11 [3] Pt.4 Ch.1 Sec.5 [7.5] Part 1 Chapter 3 Section 4 RES This notation will be issued if the design of the submarine includes a floatable Rescue Sphere in which the crew can escape and get to the surface if the pressure hull is partly damaged. Pt.4 Ch.1 Sec.5 [7.6] 2.5 Analytic investigations Notations for various analytic investigation for optimization of the design of naval surface ships are defined in Table 9. Table 9 Notations for analysis investigations Notation Characterization VA OPSIM ERG An analytical vulnerability investigation has been conducted in order to minimize the effects of flooding, fire and damage to the structure of the vessel. An analytical investigation of operational simulation has been conducted in order to determine and optimize the behaviour of the ship during special operations e.g. RAS and VERTREP An analytical investigation has been conducted in order to determine and optimize the layout of bridges or CIC s with regards to ergonomic aspects. Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 15

16 3 Service area restrictions 3.1 Restricted service area for seagoing naval ships Naval ships applying reduced loads as described in Pt.3 Ch.1 Sec.5 for a restricted service area only will have the notations specified in Table 10 affixed to their character of classification. Table 10 Notations for restricted service area Notation RSA(200) RSA(50) Service area restriction This area of service of the naval ship is restricted, in general, to operate along the coast, provided that the distance to the nearest port of refuge as well as the offshore distance do not exceed 200 nautical miles. This applies also to operation in the North Sea and within enclosed seas, such as the Mediterranean, the Black Sea and waters with similar seaway conditions. Journeys to Iceland, Spitsbergen and the Azores is exempted This area of service of the naval ship is restricted, in general, to operate along the coasts, provided that the distance to the nearest port of refuge as well as the offshore distance do not exceed 50 nautical miles. This applies also to operation within enclosed seas, such as the Baltic Sea and gulfs with similar seaway conditions. Where a permissible distance of less than 50 nautical miles has been fixed for a ship, the relevant distance will be indicated in the class certificate, e. g. RSA (20). Part 1 Chapter 3 Section 4 RSA(SW) This area of service of the naval ship is restricted to operate in sheltered waters, such as shoals, bays, haffs and firths or similar waters, where heavy seas do not occur. The notations may possibly be assigned on the basis of the seaway conditions prevailing in the respective service area (e.g. official seaway statistics). Observance of the range of service boundaries is a prerequisite for validity of the class. The Society may, on request, agree to the range of service being extended for a limited period and/or with certain reservations. This will have to be documented. Rules for classification: Naval vessels DNVGL-RU-NAVAL-Pt1Ch3. Edition December 2015 Page 16

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