As the only type of commercial vessel, Liquefied Natural Gas carriers have in the past many years maintained the steam turbine as their preferred propulsion system. This trend has persisted despite the fact that all other types of commercial vessels changed to the more efficient diesel engines in the 1970s, as a consequence of the rising fuel prices and increased environmental awareness.

Moreover, diesel engines have also proved their reliability during many years of operation. The LNG carrier did maintain the steam turbine as its propulsion system because the natural evaporated boil-off gas from the cargo is available anyway, and because no other solution for the use of boil-off gas has been made available, at that time. There are, in principle, two ways of exploiting the boil-off gas, it can be burnt in a boiler, gas turbine or dual fuel diesel engine and provide power for the propulsion of the vessel, or the boil-off gas can be reliquefied in a reliquefaction system and returned to the cargo tanks. The reliquefaction of the boil-off gas from the LNG cargo makes it possible to increase the cargo quantity delivered to the customers, instead of using it as fuel, and to install more efficient propulsion systems on LNG carriers.

An LNG carrier is a special-purpose ship in which sophisticated technology is used to transport liquefied gas, a highly flammable cargo. Safety is, of course, paramount, as is the reliability and availability of the propulsion system of such a ship, because these factors influence the whole supply chain from the well to the consumer.

Though this publication has not been designed specifically for the marine industry application, we believe that the information contained in it and covering the possible failure that may occur to the bearings could be of some use for marine engineers.

We know that if every part of the machinery performed for the whole expected service life, the job of the technicians would be much easier - they would just have to replace the worn parts from time to time, as recommended by the manufacturer of the particular part. But the good mechanic is more that just a replacer of parts, he shall be capable of conducting a proper diagnostics of the machinery in order to determine why exactly the part has failed prematurely.

The publication contains a table showing eight most popular causes of the premature failure of the bearings. It shall also be noted that in most of the cases a premature failure occurs due to the combination of two or even more of the causes listed in the table. The authors of the booklet hope that it will serve as a very useful reference manual helping readers to properly determine the cause of the bearing failures; the material is presented in a very readable format and illustrated for easier understanding.

Here is a very compact and concise but in fact remarkably comprehensive and authoritative technical overview of the most important marine energy devices of today, released with the ultimate goal of reaching to the sustainable electrical energy generation. The content of the volume includes many full-colour images and photos providing really inspiring case studies of the most technically promising energy devices and their developments. The publication is mainly aimed ant a very wide readership from general readers to the industry professionals, policy makers plus all other players of the energy industry. Brief contents below... Preface; Introduction - Marine energy and Planet, Marine resources, Historical overview, Power, energy and performance, Into the future; Capturing Marine Energy - Ocean waves, Wave energy conversion, Tidal streams, Tidal stream energy conversion, Research and development; Generating Electricity - Introductory, Power take-off, Alternate current electricity, Generators, Connecting to a grid, Large scale renewable energy; Several Case Studies on Wave Energy/Tidal Stream Energy Converters. Another interesting book on the new, quite perspective and absolutely environment friendly ways of getting electricity.

The content of the new release of the book has been rewritten in a very extensive way in order to provide mariners with a finely detailed practical manual that would cover the operating principles and real life applications of contemporary electronic systems used for the navigation.

We have all witnessed the technological advances in the field of marine navigation technology with the spearheading of these advances being the implementation of the computers - they are now quite commonly found on board nearly every marine ship. The ship officers of the new generation have been already trained to use them, understand their working principles and, the most important, understand how the computers could assist in safe ship navigation. However, thinking that the technology is perfect, is a big mistake.

Yes, most of the systems used on board ships are nearly as perfect as they have been designed to be, but you shall never ignore the possibility of the human error, as the human link is critically important one in the chain of action-reaction. And, of course, it is the Master of the ship who is carrying the ultimate responsibility. The readers of this volume will find many newly introduced electronic systems covered, together with new navigation techniques. The content supports the STCW training requirements.

Here is the 2nd, revised and updated release of the popular publication, which continues to serve as one of the best available reference sources on all medium-voltage/low-voltage electrical power cables; it is cataloging all relevant technical characteristics of the cables and is therefore assuring the eventual success for the manufacture, correct choice, installation and operation plus, of course, subsequent technical maintenance of the electrical cables.

Some of the segments related to the insulation of the electrical cables and to the field assessment were revamped in order to make them reflect the latest transformations in the electrical industry; moreover, some completely new chapters were added, for example ones touching the location of the underground faults, thermal resistivity etc. The author of the book, William A. Thue, did pay so much of the attention to the historical perspective of electrical cables, and addressed the basic dielectric theory of electrical cables, major technical characteristics of electro-conductors and cables.

The electrical properties of various insulating materials and shielding of power cables, jackets, sheaths and armors have also been dealt with in this publication. Finally, the last part of this publication has been dedicated to the various relevant industry specifications and standards.​

For the past half-century or even more than that, the electrical energy has significantly diversified and got much broader. There are several new topic areas that range from light-wave technology to the microelectro-mechanics. The book has been prepared and released with the specific intention to keep pace with the industry progress mentioned above.

The technical info contained in this publication can hardly be found in any other publication, presented in a single volume. The opening chapter of the publication provides readers with quite a brief intro to the basic concepts that are relating to the electrical power system structure, just an overview, while the following two parts have been solely dedicated to the parameters of the multi-circuit transmission lines. Then, the steady state and transient presentations are discussed together with the modeling of the synchronous machines.

After that, the chapters come dealing with the power system component modeling and covering the modeling, performance and compensation of the transmission lines, presenting the coverage of the load flow solutions, covering balanced and unbalanced flow analysis, discussing upon the key concepts of power system stability types, AGC of interconnected and isolated electric power systems etc.

Initially, from the very time of its preparation, this publication has been conceived as a revision of another one, also very practical and proven useful to the readers, namely Linear Network Analysis, which was published in 1965. Sometimes, when conducting the study of the electrical systems, is may become appropriate to specifically address to internal structure and the composition of the electrical system in question.

Then, the topology shall definitely be considered the critical analytical tool to use. However, it shall be noted that in most of the other cases the external characteristics analysis would be the one that presents interest. In this book the authors are mostly dealing with the internal composition and port, or system, characteristics. The most important mathematical tools are matrix analysis, complex variable functions, linear graphs etc. The good attempt was made in this book to a very careful development of the network theory fundamentals.

The authors also considered the frequency and time response, synthesis and analysis. Though most part of the book is limited to the linear and time-invariant electrical networks, one of the chapters have been specifically concerned with time-varying and non-linear networks.​

Below you may see the list of topics that have been covered by the authors of this publication - as you can see, the main emphasis was made by the authors on the various techniques and ways of measurement of following characteristics. The readers will get necessary technical information describing the electromagnetic variables measurement as well as the voltage and electric power measurement, understand the power factor and electric phase measurements and energy measurement.

The book sheds the light on the measurement of the electrical conductivity/resistivity and charge and also on the measurements of the electric capacitance and permittivity. The issues relating to the measurements of the electric and magnetic field strength, permeability and hysteresis, inductance and immittance, Q-factor, distortion, noise and microwave measurement have also been addressed together with the signal processing, filters and modulation matters, spectrum analysis/correlation, analog-to-digital converters, computer technology and telemetry, sensor networks/communication.

Among another important topics there are electromagnetic compatibility, various types of displays including LCD, plasma, cathode ray tube, light-emitting diode etc, reading and recording devices... Well-illustrated and useful source of technical information for electrical engineers.​