This official catalogue was released by AC Antennas, recognized and world leading company manufacturing the antennas possessing a huge portfolio of products.

The publication is provides its readers with the required general technical descriptions of all their antennas, their electrical and mechanical specifications addressing every type of the antennas produces, namely CELmar VHF, cellular, AIS, VHF, UHF, GPS and other antennas.

The present booklet also contains the specifications of the accessories plus mounting hardware. The AC antennas have proven to be designed to provide an extra-class technical performance while maintaining cost effectiveness.

Here is another popular grammatical book released for both teachers and students of English learning it as the foreign/second language. The main declared intention of the author, Nigel Turton, was to provide the learners of intermediate/advanced levels of proficiency with an easy access to the required info in order to correct their grammatical mistakes and avoid them in the future.

Talking specifically about teachers of English, this title gives a practical checklist of students' errors, provided with the explanations of the related grammar points. The textbook is covering both errors in system and word grammar, together with the so-called "common" errors. The author of the guide employed the standard (British) English, describing the differences between American and British English at the relevant entries.

All the entries in the guide feature the good examples of correct vs. incorrect usage, followed by the clear and easily understandable explanations of the grammar rules which have been broken in the particular cases. This reference addresses the errors that students of English make regularly. The errors collected by the author have been gathered from a huge number of various written texts that have been produced by the students at different proficiency levels.​

An excellent video training officially provided by Walport International and covering the key points of the management and particularly treatment of the ballast water. We are all aware of the IMO requirement of "ninety-five percent volumetric exchange" of the ballast water in the ocean - and there are three IMO approved ways in which requirement can be met.

First, by the "sequential" method - here, the ballast tank is first emptied, and then it is filled with replacement ballast water. The second method is called the "flow-through" method - here, they pump the water into the ballast tank and allow it to overflow; note that pumping through three times the tank's volume is considered to meet that ninety-five percent target of exchanged water. Third - the "dilution" method - in this one, a constant level of water in the ballast tank is maintained while water is both pumped in at the top and simultaneously discharged from the bottom. Again, three times a tank volume is usually considered sufficient to meet IMO standards.

The IMO BWM Convention addressing the issues of management and control of ballast water provides captains with another option - on board treatment of the ballast water. Filter out those bio-stowaways with some other IMO approved treatment system and you can forget about ballast water exchange. Maybe, but not yet... The system is still coming and it is getting closer, and what it means is that in some ten years the ballast exchange will be a thing of the past... A very good supplementary material for training of crew members and all people involved in the BWM, i.e. ballast water management.

This handbook has been the single source blockbuster containing all essential technical information related to the design and installation, as well as operation and maintenance of the electrical equipment and systems for more than a century. The present latest, revised and updated, release of the handbook includes the very latest advancements in transient voltage surge suppressors, fiber optics, grounding etc.

It is fully in line with the latest releases of the NSC (National Safety Code), NEC (National Electrical Code) and other regulatory documents, and features new info on electronic control of motors and on high efficiency electric motors. In addition to that, the handbook reflects all recent developments in circuits and their translations, wiring tables, transformers, lamp application tables and so much more. Any reader of the book will gain necessary theoretical plus valuable practical information and it should also be used when preparing for the electricians exams since it is very comprehensive.

The book may be used in the classroom as well as for the self-study. You will see that this publication will for sure help you resolve nearly all possible technical questions. This is not an exhaustive reference source on any single subject but rather a perfect reference to provide the general overview.   

The present Code of Practice was developed by the ABB professionals in order to provide necessary technical guidance on proper safety planning for the operations on site. The authors did their best to produce the booklet giving the practical direction to the personnel involved in the crane works and make them achieve the ABB health & safety standards.

The book is mainly focused on site operations; however, the requirements that are set down also apply as a baseline for other operations. The material presented in the book shall be used for training purposes, and the requirements included therein, must be implemented as necessary. It may be used by project managers and sales when tendering for projects, and making the agreements with different parties. Note that the document presents the ABB's minimum standards; it bases on the ILO Code of Practice.

In case a national legislation (or customer requirements) set a higher standard, then the higher of the  standards must be used. It shall also be noted that some of the H&S risks may not be covered by this document. However, the paper is very useful to everyone willing to improve the safety awareness and get better idea of the crane operations on site.

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.

This training material has been prepared and is intended for both intermediate and post-intermediate students of English. However, the authors of this publications hope that it will be equally useful for more advanced language learners. It is a thorough and comprehensive survey of structures and forms, written in very clear modern English; in addition, they have been illustrated with numerous examples.

Special attention has been given to difficult areas. Differences between grammatical forms and conversational usage are shown in the present book with the emphasis on conversational forms. You may read this book from the very beginning to the end or just go directly to the topics of your interest. It will also be ideal for all people learning English as a second language. We would say that it is a truly excellent exercise book for everyone, and maybe one of the best available today.

The publication is good for people willing to refresh their grammar skills. In fact,this title might easily serve as the main source of information for people studying English grammar, since the amount of the info provided in this book is enough to exclude the necessity of using any other supplemental publications. Try this one and you will see the result.

This is an excellent story that will for sure be appreciated by the junior readers having the interest in the sea life and adventures, pirates and other symbols of the marine life. In fact, the authors have tried to make a story telling children what is taking place during a year spent on a pirate vessel. Each of the pictures supplementing the narrative text part of the book is showing the adventures of the pirates as the months of the ear are passing.

There are so many things happening, even so far out at the ocean, and the readers will be expected to spot them. Some of the pictures contained in the book have the fragments of the ships walls taken away, and such approach will help readers have a glance inside and see what is usually hidden from their eyes. There is a calendar provided at each of the right-hand pages of the volume telling the children which month they have already reached.

The book will for sure be highly appreciated by the junior readers; according to the reviews, people like the multicultural nature of the book; another major and important aspect is that women pirates have also be paid particular attention in the pages of the volume. The illustrations have been found great and vivid making the book a great choice.