The content of this recommended practice released by DNV GL classification society is mainly based on the observations and accumulated practical experience of the specialists of this entity in advising the owners of the ships on the procedures to be followed when laying up ships and is representing a completer revision of the recommended practices issued by DNV GL earlier.
It includes the experience and recent technical knowledge of lay-up as well as preservation and subsequent re-commissioning of the MODUs. The main objective of this volume is to provide ship owners with the clear recommendations on effective and systematic approach to be applied when the vessel is being prepared for lay-up; it will also advise them how to maintain their vessels is safe and also cost effective condition during the lay-up period.
The document applies equally to the ships and MODUs. Note, however, that the recommendations provided in the pages of this publication is not intended to substitute classification requirements and are for guidance only. The book covers the lay-up conditions, guidance for preservation, lay-up and re-commissioning, statement of compliance for the providers, applicable rules and regulations, insurance aspects and many other important areas.
The present guidelines issued by the China Register will be applicable to the classification surveys conducted on oil FSVs, standing for the floating storage vessels in order to confirm their compliance with the conditions including laid-up double hull oil tankers with the cargo tanks and relevant hull systems having oil storage function, and fixed anchorage in the restricted marine environment with the offshore distance not more than twenty nautical miles.
Note that the guidelines contained in this publication do not apply to the newly constructed oil floating storage vessels or units. The content of this compact volume is arranged in three parts, and the first part provides general introductory information including class notations, plans and documentation, and statutory requirements.
The second chapter is dealing with the survey and certification including issuance and endorsements of the relevant statutory certificates. Finally, the last chapter of the guidebook addresses the technical requirements, covering the class requirements and ship-to-ship transfer. The booklet is expected to be of practical interest to all persons engaged in subject activities.
The Recommended Practice developed and distributed by DNV GL classification society to provide all required guidance for the personnel involved in the routing inspection and periodical maintenance of the jacking systems. Following correct procedures for their maintenance and inspection is quite challenging tasks because of the high turnover of personnel possessing specific technical knowledge on board and evolving nature and intermittent use of the jacking systems, and this challenge will be addressed in the pages of the present document.
The objective of this recommended practice is to ensure the safe and correct functioning of the jacking systems of an electric rack-and-pinion style during jacking and holding operations throughout the working lifetime of the system. This would include establishing required levels of competence of different specialists engaged in maintenance and inspection, providing guidance to the designers of the systems, construction yards and manufacturers on what information shall be given, highlighting the points considered critically important and also the areas with little attention paid, as indicated by the experience collected during numerous observations, and many other aspects.
These guidelines released by the China Register of Shipping stipulate the appropriate standards of AIS, standing for the Automatic Identification Systems installed on ships, the requirements to be complied with during the inspection of marine product, installation survey and subsequent surveys in service, as well as relevant testing methods.
Subject systems are intended to effectively contribute in the safety of marine navigation, protection of the marine environment and VTS, i.e. Vessel Traffic Service. This is done by satisfying the functionalities including ship-to-ship mode of operation to prevent collisions and coastal states obtaining the information relating to the vessels and cargoes transported on them.
The content of the guidebook is arranged in six chapters staring with the introduction. Two following chapters contain the technical and performance requirements applicable to the AIS systems. The rest of the chapters are devoted to the type approval and marine product inspection requirements including plans and documents to be approved, installation survey requirements, surveys in service, testing methods and test results required. Four appendices provide supplementary information such as block diagram, interface overview etc.
The present service specification released by DNV GL classification society is aiming to provide a proper methodology used for assurance of the safety and reliability of various oil and gas assets through the management of the integrity of the major safety and environmental accident barriers during the in-service phase. In-service verification of these assets would normally include their verification in the course of the operation and also the verification relating to the changes in the materials or during the repairs/modifications during the lifetime of the particular asset.
The opening part of the document provide short introduction to the subject, followed by the references including DNV GL and external resources, definitions and abbreviations, and concepts of the verification process including barrier management mentioned above, verification scheme and associated activities, performance requirements etc.
The next chapter is devoted to the methodology of the verification process, planning, execution and reporting of verification and management of change etc. The rest of the document is dealing with the operator responsibilities, effective verification schemes, review and audit, and many other important aspects. There are several appendices with supplementary information.
The officially released China Register guidelines for statutory surveys conducted on inland waterway vessels. The set of books consists of nine volumes. The first volume contains general provisions including surveys and certificates as well as assessment methods used for the classification of service area and methods of estimation of significant wave height.
The second volume provides the scope of initial, annual, intermediate and renewal surveys for compliance of the vessels with the requirements of international conventions and annexes. The other seven volumes making the package are dealing with the tonnage measurement and load lines, surveys and transportation of dangerous goods on board inland waterway ships, construction and shipboard equipment used for the prevention of environment pollution from the ships, accommodations for the crew members and passenger quotas.
The guidebooks will be of great practical use for the crew members, owners and operators of the vessels classed by China register who may use the information contained in these volume when preparing their ships to the forthcoming surveys and in general for keeping them compliant with all relevant requirements.
The present document will provide guidance related to the selective overcurrent protection installed on the shipboard electrical systems. Subject fault is commonly observed in the shipboard electrical installations and may result in blackout as well as loss of maneuverability, collisions or fires. Some relevant provisions are contained in the CCS Rules.
These guidelines shall apply to the vessels having a main power station with the total capacity exceeding 250 kVA. There are three main chapters in the document. The first chapter provides general introduction while the second chapter is dealing with the application of normal protective devices including circuit breakers, fuses and differential relays.
The third chapter addresses the selective overcurrent protection in the electrical systems covering general requirements, protection between main and emergency bus bars, main and emergency lighting bus bar, main generators and downstream devices etc. There are two appendices giving examples of the coordination analysis of the selective overcurrent protection of the shipboard electrical systems. A needful publication providing necessary information on the subject.
The content of the present officially released DNV GL document is dealing with the DNV, GL and DNV GL rules for classification of ships and MOUs (mobile offshore units), as well as the floating docks and yachts, HSC, standing for the high speed, and light crafts, underwater technology and vessels for inland navigation, plus naval vessels.
The document starts with the brief explanation of its purpose and main definitions used, followed with the description on application of the paper and relation existing between these rules and all other rules released by this class society. The third section of the document addresses the main classification principles including systematics, new construction and class entry, vessels in service and certification process to be followed for components and materials.
Three appendices provide the example of the standardized formatting of classification notations including qualifiers, general conditions and terms, and use of the product/material certificates that are used on DNV GL vessel rules conditions and exceptions. The document concludes with the list of historic changes. Note that this is the latest 2017 release of the document.