 During two decades that have passed since the original publication of this book, there have been several significant technical advances in the field of design and construction of vessels and other marine floating structures. For example, nowadays, computers are among the critically important instruments in any engineering environment, including marine engineering and ship hull construction and computers have already replaced the ubiquitous slide rules of the shipbuilding engineers of earlier generations.
Note that the advances concepts and computational methods are still under development and some of them are introduced as a part of common naval engineering practice of today. These advanced practices include the FEM, standing for the finite element analysis, CFD, i.e. computational fluid dynamics, numerical modeling of the ship hull form and associated coefficients, random methods of processing, and some of them have already been incorporated into the newly established design and manufacturing systems.
The book covers all important aspects of the intact ship stability starting from its elementary principles, determination of the weights of the vessels and their centers of gravity, stability curves and metacentric height, effects that the free liquid surfaces and changes in weights have on stability, inclining test, stability of the grounded vessel, submerged equilibrium etc.
 The present title is intended to provide the required introductory technical background to the naval architecture statistics. Each of the subjects discussed within this volume has been treated in detail, and this approach has been applied starting from the very first principle. The main objective of J. Jensen, the author of this volume, was to derive and present readers all required theoretical information for the prediction of the extreme loads and evaluation of the corresponding stresses in the hull girder of the ship.
Though some part of the book is dedicated to the reliability analysis, this treatment shall be supplemented with the methods for the detailed evaluation of stress and also for the assessment of the structural strength of the ship's hull prior to the commencement of the reliability analysis. The class societies have issued their regulations covering the structural analysis of a vessel and proper selection of its scantlings. In the past, subject regulations gave formulas for the calculation of the hull thickness and size of the stiffening members.
Such empirical regulations must be conservative so that they can be applied to the majority of the vessels. However the regulation have been changed with the advent of the powerful computers. Nowadays, naval architects can perform the structural analysis of the hull using the rational methods that are based on the first principles...
 The global warming and exploration of the hydrocarbons that is carried out in the Arctic region results in the constantly increasing maritime activity in iced waters. Nowadays, it is possible to predict if a ship will be capable of surviving an encounter with the ice of a particular given thickness; however such knowledge will not be enough to accurately predict the associated increase of the fuel costs.
In the present thesis the investigation of the validity of the analytical formulations for the ice resistance in the above mentioned geographical region has been performed. Subject formulations have been based on the trials in the Swedish-Finnish waters having lower salinity and relatively warm climate in comparison to the ones of the Arctic waters. This has been conducted by comparing the ship resistance that is estimated on the basis of the information obtained from the onboard measurements of the ship's speed and thickness of the ice as well as the engine power with the estimates received from the analytical formulations.
The topic addressed in this book is very challenging and rewarding. The thesis starts with the introduction followed by the description of the characteristics of the sea ice, models used for the calculation of the ice induced hull resistance, open-water resistance, analysis of the relevant statistical data, and many other important aspects.
 The kite propulsion has already emerged as one of the promising and attractive ways of harnessing the power of the wind to yield the financial and also environmental benefits. In order to better facilitate both design and optimization of the propulsion systems of this type, people have to possess a thorough understanding of the dynamics affecting the kite motion and all resulting forces.
The present thesis contains the results obtained from two line tension models and those results have been compared with the time histories for the flights collected during the experiments. Some new methodologies for the investigation of kite performance have been established. The first model is the "zero mass model" assuming that both kite and lines have no weight, while the second model - "lumped mass model" considers the mass of the kite and therefore makes use of the motion equation.
It has been determined that both models converge to same results in the limit where the mass of the kite is tending to zero. The publication covers such important topics related to the kite propulsion as experimental methods to record the trajectories of the flights, comparison of the models mentioned above, determination of the kite forces using 3D flight trajectories, fuel saving issues etc.
 In previous research works an intact stability criterion has been developing aiming at determination of the sufficient intact stability of a vessel in a heavy weather condition. The aim of that criterion was the establishing of the minimum stability level that would ensure that the risk of capsizing that remains is as low as it is reasonably practical. Subject criterion results in the calculation of the index value.
To make this criterion applicable from the practice point of view we will need to define the threshold values for this index in order to distinguish between unsafe and safe vessels/conditions and establishing the minimum safety level in heavy weather. To set the threshold value for ISEI, standing for the insufficient stability event index), the authors of this volume have conducted the investigation of several events of the full-scale capsizing together with the numerical computational methods and procedures.
Subject procedures and methods are mainly based on the computation of non-linear rolling motions of the vessel. Such methods/procedures have been under development in the course of the last decades with the intention of their authors to conduct the analysis of the full scope events of capsizing for authorities of Germany. The associated computations could be used to determine the required threshold values for the dynamic intact stability criterion...
 The whole process of design and further operation of the commercial vessels have been subjected to the significant changes during past decades. All of those changes together with the serious impact they have on the intact stability performance of vessels, have motivated the specialists of the IMO to develop the second generation criteria of intact stability. Among the most important modes of stability failure, considered primary, we would note the pure loss of ship stability, broaching-to and parametric roll resistance.
The stability criteria addressed in this publication have been designed in a multi-layered structure, with the first two layers consisting of level 1/2 vulnerability criteria mainly used for the preliminary checks of the risk of dynamic stability failure during the design stage. The present document describes the valuable contribution of the US specialists to the development of those criteria including all stability failure modes. Sufficient level of the intact stability of the vessel is the most basic and important requirement.
The working group dealing with the development of the second generation criteria for the intact stability of ships, has outlines three major modes of stability failures. One of the modes is the stability of the vessel under dead-ship conditions, as defined bi the corresponding SOLAS regulation contained in II-1/3-8. The other two modes cover the restoring arm variation and maneuvering related problems...
 The ship survivability is directly related to the requirements governing the intact/damage stability of the ship. It should actually be noted that the intact survivability of the vessels has received relatively more attention. The safety of the passenger ships has always been considered a prime concern for all regulatory authorities. There are several established and proven ways of assessment of the damage stability of the ships, including the probabilistic, deterministic methods and the real-time simulation.
The main purpose of the present study was to address the further development of the ship stability software using the MATLAB program on the basis of the real time simulation, i.e. third approach, of the dynamic behavior of the damaged ship at waves. The particular vessel called "Sarawak Fast Ferry" has been specifically chosen to perform the parametric study for the further application of the DSP, standing for the Damage Stability Program, which, in turn, has been developed and introduced.
The experiment has been conducted by means of the image processing and the results obtained during the experiment showed a remarkably good correlation to the simulation results. Subject results have also shown that the loading conditions and height of the waves are the most important and influencing factor to the stability of the vessels...
 Naval officers having some basic mathematical ability can easily make themselves familiar with the fundamental principles governing the design of the vessels and the most commonly used calculation methods; however, those willing to become naval constructors would require long and very patient apprenticeship of the shipyard.
The naval architecture addresses such the problems as how to make a vessel sail and carry weights, how to make the vessel stand right at sea and obey the commander, and go easily through the waves at a given speed, in fact everything connected with the construction of the vessels and prediction/calculation of their behavior at sea.
In fact, shipbuilding itself implies giving the materials of which the vessel is to be made of all the shapes, forms and dimensions, as well as strength and power characteristics required to make them fully comply with the conditions that have been already calculated by the naval architects. he naval architects, shipbuilders and marine engineers are representing three professional skills.
Their duties shall be performed successfully so that the duties of the newly built vessel may also be performed in a successful manner. All of these duties are considered essential but they do not have to be performed by three separate people... Have a look into this rare and classic book, you will not get disappointed, it is much more than a regular textbook.
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