The best maritime and offshore library


As we all know from the school, water occupies the majority of our planet, covering more than seventy percent of its surface. The oceans, seas, lakes and rivers provide the enormous number of different and interesting venues for sailing activities, literally everywhere in the world. It also provides a sort of highways to be used by the offshore sailors when traveling from one place to another, the playing field for the racing sailors, and peaceful setting for pleasure, much appreciated by the cruising sailors.

And, of course, it provides all above people with the great break from living ashore. The author of this volume has spent many years in the sailing industry working in the different parts of the world and is now sharing his experience with the people having same passion for sailing. The exhaustive and colorful information on the best selected sailing destination has been provided.

You will definitely be pleased with the number of destinations and the descriptions provided by the author – most probably, they will make you head out immediately. We recommend the publication to all people in love with sailing, with the hope that it will lead them to the new and fascinating places.

9 Views 0 Comments Read more

According to the author, the present volume was written with the ultimate intention to provide merchant seafarers as well as the other mariners with the formulae they may need during their work. Unfortunately, most of those formulae tend to get forgotten by the people if not used every day. It should not be looked at as the complete list of all formulae to solve all possible problems, but rather to give the list of commonly applied ones.

One of the great features of the publication is the coverage of the different areas, from navigation calculations to the ship stability electricity related calculations and so many others. After the introductory part, the volume gives the general information about the key functions of the calculator machines, and trigonometrical functions. The navigation related calculations include rectangular to polar conversion, ETA, Mercator sailing, great circle, amplitude, azimuth, altitude, and others.

Then, there are many practical calculations covered including, but not limited to the visibility of the navigation lights, fuel conservation, draft change caused by the density, volume and area, bearing problems, cargo handling etc. Several conversion tables conclude the volume.

5 Views 0 Comments Read more

The present IMO Model Course is dealing with the on-board assessment, considered one of the most important aspects of the working on the ship. That is why it opens with the section underlining the need for the assessment and explaining its objective and scope; note that the relationship of the subject course with all other IMO model courses is also explained, together with the requirements commonly applicable to such assessments.

The definitions of the shipboard assessment, as well as the performance objectives, measures, and standards are provided. The three sub-steps of the performance objective have been identified in the next section of the course, followed with the one where the performance measures and standards are determined. After that, the students will proceed to the preparation of the assessment package and the assessment process.

The scope of the pre-assessment meeting is described in the following section, together with the established procedures and associated criteria and standards. Covering the important aspect of shipboard work, the course is a must-pass for every mariner intending to join the ship and the content shall be conveyed to them as necessary.

6 Views 0 Comments Read more
Drill String and Tool Joints

Unlike drill collars, the drill string is not ordinarily used to put weight on the bit. The drill string is made of steel or aluminum and is normally used for two basic purposes: to serve as a conduit, or conductor, for the drilling fluid; and to transmit the rotation of the rotary table or top drive to the bit on the bottom. Since it is not exclusively used to put weight on the bit, the drill string is smaller and lighter than the drill collars. In addition, in straight-hole drilling, it is suspended in the hole under tension, not compression. It is kept in tension by two opposing forces – the weight of the collars pulling it from the below and the hoist, line, and blocks pulling on it from the surface. Keeping the drill string in tension prevents it from bending and buckling and prolongs its life.

Manufacturers design the drill string so that it can withstand some of the most common stresses encountered during drilling. Relative to a drill collar, the drill string is small and thin, yet it can withstand powerful forces. Basically, the drill string is a column, or string, or drill pipe with attached tool joints. Most drill pipe is steel that is forged into a solid bar and then pierced to produce a seamless tube. Because the wall of the tube is relatively thin, usually less than half-inch thick, the manufacturer cannot cut threads into it. To solve the problem of providing threaded ends, so that the pipes can be screwed together, manufacturers produce toolDrill String and Tool Joints 2 joints.

The tool joint is a separate piece of metal welded onto a seamless drill pipe to produce the characteristic bulge at each end. The wall of the tool joint is thick enough to have the pin or the box cut into it. To prepare the drill pipe for welding, the manufacturer first heats the ends of the pipe and then strikes the heated end forcefully. These heavy end-on blows thicken the hot steel in the pipe ends. Manufacturers call the thickened ends “upsets”. The pipe maker thickens the last 3 to 6 inches of each end of the pipe to make it stronger.

Manufacturers produce drill pipe with different types of offsets. Some have an internal upset: that is, the bore of the drill pipe is reduced. Viewing the pipe from outside reveals no thickened areas. Smaller pipes have an external upset. These pipes have increased outer diameters. The internal diameter, or bore, of the pipe is not reduced. Most drill pipe comes with both internal and external upsets.

Once the ends of the drill pipe are upset, the manufacturer welds the cylindrical tool joints to the upset ends by spinning the tool joint at a high rate of speed ton a flywheel while the joint is touching the upset end of the pipe. Placing the upset end of the pipe against the spinning tool joint creates enough heat to weld the two together. This type of welding is referred to as friction welding, or inertia welding.

The wall of the tool joint is about 2 inches thick and about a foot long. Each tool joint pin and box includes the tong area and the elevator shoulder. The tong area refers to that area of the point to which drilling crews attach the tongs that make up or break out the tool joints. Pipe manufacturers machine and shape the tool joint and cut threads into it to make one end of the pipe a pin and the other end a box.Drill String and Tool Joints 3








Manufacturers produce some tool joints with hardfacing on the joint’s exterior. When correctly applied, hardfacing may greatly increase the life of a tool joint. Tool joints tend to wear more rapidly when rotating through a dogleg or a curved portion of the hole. An abrasive formation can reduce the size of the tool joint and weaken it. The hardfacing on the tool joint can withstand abrasive wear much better than ordinary steel surfaces can and thus can prolong the life of the tool joint.

Manufacturers also produce tool joints with tapered elevator shoulders so that the pipe can more easily slide past doglegs and curves in the wellbore. Normally, the shoulder of the box has an 18 degree taper. Years ago API recommended that the pin shoulder should also be tapered to 18 degrees. Producing this gradual taper on the pin, however, increased the pin length. Adding to the length of the pin or the box increases the cost of the joints. For years, the industry agreed that only the box needed the 18 degree taper. Thus, API recommended a compromise taper of 35 degrees for pin shoulders. With more horizontal drilling taking place and extended-reach wells getting longer and longer, however, the need for a 18 degree pin shoulder has become more apparent. Pin shoulders with this degree of taper reduce the drag on drill pipe during trips out of the hole. API has now agreed to make 18 degree pin shoulders an acceptable option.

4 Viewing 0 Comments Read more

While the publication was originally written with the automotive industry in mind, the content will also be useful to the engineers engaged in the marine industry. The introduction is followed with the first chapter dealing with the engine supervision methods, troubleshooting and fault finding, and different methods that are used for diagnosis and belong to the general field of condition monitoring of the technical process.

The idea is to give a correct indication of any undesired states requiring action in order to avoid any accidents or damages. The second chapter is entirely devoted to the diagnosis works on the internal combustion engines, while the third one is dealing with the electric drives, actuators and motors. The fourth chapter addresses the fault-tolerant systems together with their basic components.

Finally, the appendix to the main part of the publication contains additional information about the models and functions, properties for the systems, as well as the associated states and signals. The publication will be of practical use for the people involved in the technical maintenance and repair of the internal combustion engines as part of their duties.

85 Views 0 Comments Read more

As we know, every bulk carrier shall be in possession of the designated shipboard manual covering the ship operations. For this purpose, the “Bulk Carrier Practice” publication officially released by The Nautical Institute shall be used as necessary. The notes that are contained in the pages of this supplementary document will be particularly useful when applied as a sort of additional manual for the crew, providing the guidelines to the safe and proper procedures to be followed when conducting the shipboard operations, including the cargo operations, ballasting/de-ballasting, and cleaning the holds.

You are encouraged to keep both of the above mentioned documents on board your vessel at all times to ensure their availability. The present manual shall also be read together with the safety manual of the company. The first chapters of the manual provide the introductory notes and the definitions of the terms used, followed with the information about the ballasting operations, loading and discharge, draught surveys, hatch covers etc. After that, the information on the cargoes is provided, covering the alumina and coal, grain and sulphur, ore and iron, and many other types of cargo commonly carried on board modern bulk carriers.

80 Views 0 Comments Read more

This is a good collection of the classification and safety marks relating to the marine transportation of the dangerous goods. As we know, the carriage of the dangerous goods is governed by the provisions of the IMDG Code, covering nine classes of the dangerous goods, namely the explosives and gases, liquids and solids of flammable nature, organic peroxides and oxidizing substances, infectious and poisonous substances, corrosive and radioactive substances and, finally, all others combined under the umbrella of miscellaneous substances.

The booklet starts with the general introduction to the requirements of the Code and a general outline of the above listed classes together with their characteristics imposing additional requirements of their marine transportation. This is followed by the clear and concise explanations of the terminology applied. The main part of the document provides the safety marks that shall be used when the dangerous goods are transported on board your vessel. Note that the idea of the authors was to provide general introduction and not the detailed specific instructions on the transportation. The provisions of the IMDG Code and other relevant publications shall be referred to at all times.

68 Views 0 Comments Read more

This compact booklet was prepared to provide readers with the absolutely basic information about the celestial navigation. In fact, we can say that the essential principles of the subject science are quite simple. Of course, when it comes to the more detailed calculations, you will have to apply good mathematics.

The document shall be used to get some understanding of the calculations and should be used by the people making their first steps in the celestial navigation. Note that it is based on the celestial mechanics, which is a pretty precise. What it means is that it will be possible to precisely determine the location of the bodies at any given time. Well, and once you know the star position, and make other measurements using the ship’s sextant – it will be sufficient to determine the coordinates, i.e. longitude and latitude of your position.

Of course, one should not treat the present publication as a textbook of celestial navigation, but it will still give reader some idea of what it is. Take some time going through the pages; as you can see, it will only require not more than one hour to read it from the beginning to the end, and you will definitely get to know something new and apply it whenever needed.

88 Views 0 Comments Read more
1 2 3 ... 479 480 »
Enter the site
Read Later

    The "Read Later" function allows you to add material to this block with just one click. Just click on the icon and read the articles that interest you at any convenient time.

Top Posts
Rate my site