Marine Engineering

Bulkers are segregated into six major size categories:  small,  handysize ,  handymax ,  panamax ,  capesize ,  and very large.  (Very large bulk and ore carriers fall into the capesize category but are often considered separately.) Name Size in DWT Handysize 10,000 to 35,000 Handymax 35,000 to 59,000 Panamax 60,000 to 80,000 Capesize 80,000 and over Categories as per regions Kamsarmax  : Maximum length overall 229 meters refers to a new type of ships, larger than panamax, that are suitable for berthing at the Port of Kamsar (Republic of Guinea), where the major loading terminal of bauxite is restricted to vessels not more than 229 meters. Newcastlemax : Maximum beam 50 meters, and maximum length overall of 300 meters Refers to the largest vessel able to enter the port of Newcastle, Australia at about 185,000 DWT Setouchmax : About 203,000 DWT, being...

These consist of hydro-dynamically based thrust augmentation devices also called as energy saving devices. These devices can be considered to be operating in three basic zones of the hull as follows i.   Located before the propeller. ii.  Located at the propeller. iii. Located after the propeller. Before the propeller 1. Pre-swirl Stator (PSS) It consists of a set of blades right in  front of the propeller. The aim is to  reduce the rotational losses in the  propeller slipstream by introducing a  rotation in the inflow to the propeller. PSS increases the hull efficiency and  hence the total propulsive efficiency.  DNV classification society has  reported a 6% power saving in design  draught but just about 1% in ballast  in a Kamsarmax bulk carrier that gives  indication of the potential of PSS for  the full form vessels. 2.  Becker Mewis Duct It is a Pre-swirl Stator with  Accelerat...

Anti-fouling Coatings Traditional antifouling type known as CDP (Controlled Depletion Polymer) is high rosin based that dissolves slowly in seawater. The useful lifetime of CDP paints is usually limited to 36 months. This can be extended by regular underwater scrubbing to remove the leached layer and rejuvenate the paint film but the effectiveness of such cleaning may be limited with respect to time. Two main high-performance polymer-based tin-free SPC (Self Polishing Co-polymers) technologies in current use are namely metal acrylate co-polymers and silyl acrylate co-polymers. The performance of certain current copper acrylate SPC products are understood to be at least equivalent to TBT-SPC products (TBT-SPC products are banned) that were in use prior to 2003.  While the above mentioned two types of antifouling coatings have biocides release properties, it can only be expected that the trend for increasing legislation in this area will eventually lead to removal ...

Below Procedure will come very handy for seafarers which have to deposits any particular fees for anything related to MMD's in India. As MMD's is going for all online transaction to ease up the process. And it might save your 100-200 Rupees which you will pay to the shops outside of MMD's if you dont know these things for on-line payment. If i got anything wrong, feel free to connect us at  https://meoexamz.com  and plz share this post as it might be useful for others also. Follow below steps for on-line transaction : 1. Open the NTRP site by: https://bharatkosh.gov.in/ 2. Choose Non-Registered Users.Also, you can register by Login, by creating ID and Password. 3. Select Depositors category as Individual or Autonomous body or PSU or Ministry, Department etc for Seafarers select Individual . 4. Click on Search button on  Purpose , in ministry select  Shipping  and Search. 5. Select Payment to your concerned M...

1.Any IC engine of cylinder diameter of 200 mm or a crankcase volume of 0.6 m3 and above shall be provide with crankcase relief valve of a suitable type with sufficient relief area. 2.In large engine, cylinder diameter more than 300mm, require one relief valve to be placed on each crankcase door. 3.In small engine, cylinder diameter not more than 300mm, crankcase door of which are usually very strong. It may have relief valve or valves at its end. 4.Its free area should not be smaller than 45cm2 and there shall be minimum of 115cm2 /m3 of the gross crankcase volume. 5.Spring setting for opening pressure is 0.07 bar at an internal pressure and will close when the pressure has been relieved. 6.The valves should open smartly and close positively and rapidly. 7. The relief valves shall be arranged or provided with means to ensure that discharge from them is so directed as to minimize the possibility of injury to personnel.

The incoming refrigerant temperature is low and chances of emerging hot spots is low. Crankcase forms the suction chamber of the compressor and chances exist that the compressor may draw in air and moisture. There is no O 2  available inside the crankcase of reefer plant which can lead to explosion.

It present the concept of an indicator for the energy efficiency of a ship It can be used to establish a consistent approach for voluntary use of an EEOI as its not mandatory. It will assist ship-owners/operators in the evaluation of the performance of their fleet with regard to CO2 emissions. Ship-owners are invited to implement either these Guidelines or an equivalent method in their environmental management systems. To provide assistance in the process of establishing a mechanism to achieve the limitation or reduction of greenhouse gas emissions from ships in operation. It present the concept of an indicator for the energy efficiency of a ship in operation, as an expression of efficiency expressed in the form of CO2 emitted per unit of transport work. These are intended to provide an example of a calculation method which could be used as an objective, performance-based approach to monitoring the efficiency of a ship’s operation. When using the EEOI as a performance indicator, the i...