This topic is an additional knowledge support for SHIP STRENGTH CALCULATION (Part 1) and SHIP STRENGTH CALCULATION (Part 2). Under sea-going condition, the Hogging and Sagging condition make the ship steel be continuously compressed and stretched those making steel become fatigue collapsed specially … Continue reading Sheer Strake – An important plate of ship
The Draft, as simple definition is the distance between the sea level and the bottom of hull (included the thickness of bottom – see this topic) Meanwhile, at the initial design stage, there are two terms of Scantling & Design … Continue reading Design draft vs Scantling draft
During the 62nd session of the MEPC (11–15 July 2011), at IMO Headquarters in London, the represented Parties to MARPOL Annex VI adopted amendments to Annex VI Regulations for the prevention of air pollution from ships. Considered the first regulation to establish CO2 standards across a global sector, the Energy Efficiency Design Index (EEDI). In terms of CO2 emissions, shipping contributes to about 2.5% of the world’s emissions and the emission rate will increase by 75% in the next 15 years due to demand and growth in global trade. What is EEDI mean? The EEDI is used to calculate a … Continue reading EEDI and CO2 emission
Today, when recycling and re-using goods and products become an important requirement, even ships are recycled. With the rise in awareness towards maritime environment, there have been several changes in the process of ship breaking, which have given rise to a new term – green ship recycling. Why is Ship Recycling needed? Ship dismantling is highly necessary as the maintenance expenses of a particular vessel keep increasing with time and difficult to affordable. Therefore, the shipowners seek the easy way out and hand over the old vessel for effective disposal, so that they can focus on dealing with other regular expenses … Continue reading Ship Green passport and demolition
As discussed in our previous article (NOx & Tier), one of the major global environmental concerns today is the air pollution from maritime transportation. The main elements of pollution are NOx and SOx. Sulfur oxides emission is mainly due to the presence and burning of sulfur compound in the fuel. Causes and Effects of SOx Emission The sulfur oxides emission is due to the presence of sulfur compound in the marine fuels used in marine engines on board vessel. Better the grade, lower will be the sulfur content as it is removed by refining of the fuel. The smoke containing sulfur … Continue reading SOx and Marine Fuel quality
Air pollution from ships is on the rise and global emission standards are getting stringent every year. MARPOL Annex VI limits the main air pollutants contained in ships exhaust gas, including sulphur oxides (SOx) and nitrous oxides (NOx), and prohibits deliberate emissions of ozone depleting substances. What is NOx? NOx is a term for mono-nitrogen oxides NO and NO2 (nitric oxide and nitrogen dioxide). They are produced from the reaction of nitrogen and oxygen gases in the air during engine combustion, in other mean, NOx formed when diesel fuel is burned with excess air-oxygen intake. Nitrogen is a natural element in the … Continue reading Engines with NOx and Tier I, II, III status
MARPOL 73/78, since it came into force in 1973 and later revised by the protocol in 1978, ensures that shipping remains the least environmentally damaging modes of transport. It clearly highlights the points to ensure that marine environment is preserved by elimination of pollution by all harmful substance which can be discharged from ship. MARPOL 73/78 This marine environmental convention consists of six implemented Annexes for controlling and eliminating of marine pollution. Annex I: Regulation for prevention of pollution by oil from operational measures as well as from accidental discharges. Key relations: 1. Ballasting or cleaning of cargo oil tanks (Emcy’ ballast, … Continue reading MARPOL 73/78 – A General Overview
Ships need ballast water for many reasons: To achieve the sufficient draft and stability To reduce stress on structure integrity To correct the list or trim Ships carry ballast water to maintain stability in rough seas and when sailing without cargo. After a vessel has been unloaded the water is typically pumped into purpose-built tanks onboard. It is then drained during loading at the destination port, bringing ashore organisms which pose environmental and even health risks. This is suspected to have contributed toward a cholera outbreak in Peru – bệnh dịch tả hoành hành tại Peru that affected over 10,000 people. The International … Continue reading Ballast Water Management System
There is no excerpt because this is a protected post. Continue reading Protected: PSPC – Performance Standard for Coating of Ballast Tanks – Part 2
AMARINE 