The provisions of this recommended practice developed and released by DNV GL are dealing with the application of the risk management to the marine and subsea operations. The opening section of the publication provides some introduction to the major principles of risk management and explain the definitions and terms commonly used.
The main part of the document is devoted to the risk management planning including not only general information on the process but also preparation of the proper risk management plan. The third section contains the references. There are four appendices containing some additional information relating to the general quality assurance and hazard identification activities plus risk deducing activities.
All marine operations including all associated support operations, shall be carefully assessed at the stage of conceptual design. If this is done then the quality assurance and risk management will positively influence the progress. All marine operations shall be designed with due attention paid to the resisting loads; they shall also be safe and practicable. The redundancy and backup philosophy shall also be addressed during the planning process...
The present Rules have been developed to apply to the CCS-classed vessels with the "Intelligent Ship" classification notation requested. The term intelligentization is referred to as numerous applications that are considered specific to certain objects integrated through modern communication as well as IT, i.e. information technology, associated intelligent control and computer network technology.
These application would include not only the assessment and diagnosis, but also prediction and making of the relevant decisions. It is characterized by perception, memory and thinking, learning and self-adaptability, and finally, behavioral decision making.
The vessels dealt with in the pages of this volume automatically perceive/obtain the data and information and the vessel, logistics and marine environment, port etc. using the sensors and communication equipment, internet and all other available means to achieve desired intelligent operation concerning safe navigation and ship management, cargo transportation and technical maintenance, automation and data processing etc., with the ultimate goal to make vessel safer, more reliable, more efficient and environmentally friendly.
The present recommended practice by DNV GL is dealing with the risk based approach to the corrosion management. Today, more than sixty percent of the whole offshore fleet are past their twenty-year design age. Taking economic pressure into account, the offshore rigs are kept operating for much longer periods than they are designed for. In addition, there are numerous offshore rigs approaching this age.
It means that the operators of the rigs shall manage their material deterioration as necessary, i.e. pay close attention to corrosion and cracking. They shall also show the rig owners as well as the stakeholders and other interested parties the safety and integrity of the rigs in question. The content of this recommended practice commence s with the introduction to the problem followed by the section providing detailed process description.
The third section deals with the pre-assessment including identification of the potential risk for different zones while the next section covers risk ranking and screening. Three remaining sections of the document address the detailed examination stage of the process including assessment of the coating condition, remediation measures including cathodic protection, corrosion monitoring and inhibition, and lifecycle management.
The present CCS Rulebook applicable to the green ships was released with the intention to advocate the development and subsequent application of the green technologies as well as to facilitate the promotion of the structural optimization/upgrading of ship construction, shipping industry, implementation of the effective technologies and using proper management measures to both newly delivered and existing vessels to increase the green grade.
This, when implemented in the operation of the fleets of shipping companies, would eventually result in achieving low consumption and emissions of the vessels, low pollution volumes and better working environment for the people on board. There are three main objectives of green ships, namely energy efficiency, protection of the environment, and improving working environment, and they are all covered in the first three chapters of this document, making part one providing requirements for the ships engaged in the international voyages.
The second part of the volume is dealing with the domestically operating ships. Appendices to the main content of the rulebook provide guidelines for calculation EEDI, development of the associated electric power tables, determining minimum propulsion power, verification of the basic design and tank test of power curves.
The latest release of the China Register Rules to be applied to the cruise ships classed with CCS. Starting with the general provisions and description of the relevant class notations, the rulebook then moves to the chapter dealing with the hull structures including longitudinal strength and scantlings, direct calculation of the local and overall strength, fatigue, ultimate and residual strength.
The third chapter is covering fire safety of the ships including requirements for the spaces featuring special structure, and alternative design and arrangements. The other chapters of the document cover noise and vibration, lifesaving arrangements, passenger occupation, ship stability, leisure facilities available on board, sanitation ensurance etc. Some additional information is contained in the appendices.
Note that there is one more rulebook included in the set and providing guidelines for the survey of the air conditioning systems installed on board cruise vessels. The document will present interest to the people involved in the design and construction of the cruise ships under CCS class since it contains all relevant requirements to be taken into consideration.
This pack of tentative recommended practices released by DNV GL class society is made of four documents providing recommendations to selection of the standards applicable to the electrical and instrumental components, piping components, steel bulk items, and structural steel materials.
The arrangement of the material in each of the publications is pretty standard - they all start with the introduction followed with the summary of standards, requirements and key parameters, information on the evaluation, and recommended requirements. Some of the papers contain additional information presented in the appendices to the main content.
The ultimate objective of these recommended practices is to provide interested parties with the uniform reference to be applied when selecting standards for the design and subsequent fabrication of the cables including low- and high-voltage cabling arrangements, instrument cables and tubes, clamps and fittings, piping insulation and ball valves, tertiary structural items, and many other aspects. The content of the documents will be of practical interest to the people directly engaged in certification of the above listed items.
The DNV GL recommended practice relating to the riser interference. Today it is critically important to have an accurate methodology for the assessment of the riser interference, taking into account that the offshore exploration of oil and gas is moving to deeper waters. This, in turn, is causing increased risk of interference between risers. The general design practice traditionally applied to the marine risers is that the collisions must not be allowed under any conditions, from normal to extreme.
The present DNV GL publication is considering the established design analysis procedures as well as criteria applicable for the assessment of the marine riser interference. The objective of the volume is to provide the recommendation relating to the methodology for the engineering analysis as well as to give the rational criteria and technical guidance.
Apart from the introduction, the content of the document is arranged in four major parts covering the design approach mentioned above, hydrodynamic interaction, marine riser clearance assessment, and the one providing references. There are also three appendices giving information about the phenomenon of hydrodynamic interaction, analysis of the local impact stress applied to the steel pipes, and relevant analysis considerations.
The China Register rules to be applied for the construction and classification of the sea going HSC, standing for the high speed craft. The main part of the document is arranged in eight chapters. The first introductory chapter contains general provisions including information about CCS. The second chapter is covering scope and conditions including general class requirements, class notations and characters, submission and subsequent approval of documentation, associated certification paperwork, liability matters etc.
The third chapter addresses the inspections of marine products together with the surveys of craft while the fourth chapter concentrates on the hull structure including relevant design requirements and loads, watertight integrity of the hull, scantlings of the hull constructed of aluminum, steel and FRP, hull vibration and calculations, weld design, corrosion prevention measures, etc.
The fifth chapter is dealing with the equipment and outfitting items including rudders and anchoring/mooring equipment. The last three chapters of the publication are covering machinery and electrical installations, and remote control systems as well as the safety and alarm systems. Three appendices contain supplementary information.