White paper on the environmental impact of batteries in deep-sea shipping
The experts from #CIMAC Greenhouse Gas Strategy Group, Working Group 20 System Integration, Working Group 21 Propulsion, and the Maritime Battery Forum have consolidated their knowledge and .. more
Subject: Attendance at Type Approval Tests (TAT)
Background: Within the last years quite some experience was gained during Type Approval Tests. We have realized that Class surveyors well attended the TAT but nearly without any contribution to the process. Various reasons could be sorted out such as no information about the engine or the system, lack of interest etc. It is always hard to see how costs are accumulating for nothing. It has to be realized that there is no or at least not much time to explain a system or the engine functions during a TAT. We feel that the announcement of a forthcoming TAT and the invitation to the TAT one month ahead should give time enough that those persons attending a TAT are more or less well informed about the object and what they should witness.
Proposal: We recommend IACS MP to nominate a limited number of permanent or ad hoc selected Class representatives to participate in Type Approval Tests and witnessing on behalf of all IACS members. The engine builder or designer has to forward a TAT program for approval to all the Classes who subsequently will receive the TAT Report and will be asked to issue a Type Approval Certificate.
Download Publication [PDF]CIMAC WG7 IRSG US Gulf Statement 2024
In 2023, mainly during the period between March and July, an uncharacteristic number of operational engine issues were reported to have occurred after consumption of Very Low Sulphur Fuel Oils .. more
CIMAC WG 7 Fuels | ISO 8217:2024 - Design and operation of fuel cleaning systems for diesel engines
The safe handling of fuels on board ship requires four key component elements to align to ensure the fuel as delivered is safely and efficiently stored, cleaned, and conditioned prior to its .. more
CIMAC WG 7 Fuels | ISO 8217:2024 - The Interpretation of Marine Fuel Analysis Test Results
This guideline is a revision of the CIMAC WG7 guideline No. 02:2016 [1] which was developed in order to provide information on how to apply the ISO 4259 approach to the interpretation of the .. more
CIMAC WG 7 Fuels | ISO 8217:2024 - Overview and interpretation of total sediment test results in the context of ISO 8217:2024
Experience from the marine fuels market, since the introduction of the 0.50 % sulfur fuels, has shown that the blends making up the very low sulfur fuel oils have various sediment anomalies that .. more
CIMAC WG 7 Fuels | ISO 8217:2024 - Marine-fuels containing FAME: A guideline for shipowners & operators
One of the most readily available ways to decarbonise shipping is the use of biomass derived fuels. The current amount of available biofuel is not sufficient to reach the targets set. It is however .. more
CIMAC WG 7 Fuels | ISO 8217:2024 - FAQ
In 2024, a new edition of ISO 8217 (edition seven) has been published. In the absence of an in-depth discussion of the various reports and associated background documentation that helped form the .. more
CIMAC Digitalization SG | On Enabling the Implementation of a Ship-wide Data Ecosystem
This publication is for guidance and gives an overview regarding Enabling the Implementation of a Ship-wide Data Ecosystem.
The publication and its contents have been provided for informational .. more
CIMAC WG 21 | Guideline on the development of the rules for stopping a ship with azimuthing thrusters
This guideline is about making new rules for stopping ships that use azimuthing thrusters. The current SOLAS rules don't consider modern ship designs with different types of propulsion systems and .. more
CIMAC WG 8 | Guideline: The causes of scuffing and actions to prevent scuffing in two-stroke engines
The latest publication from CIMAC WG8 ‘Lubrication' titled ‘CIMAC WG 8 | Guideline: The causes of scuffing and actions to prevent scuffing in two-stroke engines’ is now .. more
CIMAC WG7 | Organic chloride fuel incidents
The latest publication from CIMAC WG7 ‘Fuels' titled ‘2022 Organic Chlorides, marine fuels incidents’ is now published and available for download.
In February and .. more
CIMAC WG5 | White Paper: CCUS – Carbon Capture, Utilisation and Storage
The latest white paper from CIMAC WG5 ‘Exhaust Emissions Control' titled ‘CCUS – Carbon Capture, Utilisation and Storage’ is now published and available .. more
CIMAC WG15 | Position Paper - Cyber Security and Related Standards
The latest position paper from CIMAC WG15 ‘Control & Automation' titled ‘Cyber Security and Related Standards’ is now published and available for download.
This .. more
CIMAC WG20 | Guideline - Monitoring Systems for Marine Hybrid Propulsion Systems
The latest Guideline from subgroup 'Monitoring Systems' of CIMAC WG20 'System Integration' titled ‘Monitoring Systems for Marine Hybrid Propulsion Systems’ is now published and .. more
CIMAC WG17 | Guideline - Hydrogen in Stationary 4-Stroke Gas Engines for Power Generation
The CIMAC Guideline ‘Hydrogen in Stationary 4-Stroke Gas Engines for Power Generation’ has been compiled by the CIMAC WG17 'Gas Engines' members and describes influence on gas .. more
CIMAC on future marine fuels – New position paper published
A new position paper on future marine efuels now has been published by the CIMAC Greenhouse Gas Strategy Group. The intention of the paper is to indicate which eFuels are most relevant for future .. more
CIMAC WG21 | Guideline - Hydraulics and Lubrication Rules of Steerable Thrusters
The CIMAC WG21 Guideline on the 'Hydraulics and Lubrication Rules of Steerable Thrusters' addresses a collection of questionable or unclear rules from classification societies, that are .. more
CIMAC WG8 | Guideline - Lubrication of Reciprocating Gas Engines
The CIMAC WG8 Guideline on the 'Lubrication of Reciprocating Gas Engines' brings together insights into and current practices for the lubrication of gas burning engines. Combustion processes in .. more
CIMAC GHG Strategy Group | White Paper 3 and 4
To achieve the needed greenhouse gas emission reductions in line with the IMO GHG Strategy and the Paris Agreement, the deployment of (net) zero carbon fuels is necessary – besides other .. more
CIMAC GHG Strategy Group | Position Paper and White Paper 1 and 2
With the Position Paper “Zero Carbon Energy Sources for Shipping”, the Greenhouse Gas (GHG) Strategy Group aims to communicate the need for zero carbon energy sources in shipping. To .. more
CIMAC WG07 | Guideline - Marine fuel handling in connection to stability and compatibility
The guideline explains stability and compatibility of marine fuel oils in a practical way and provide advise on how to manage these fuel properties in the supply chain and onboard ships. Details on .. more
Joint Industry Guidance on the supply and use of 0.50% - sulphur marine fuel
A number of shipping, refining, fuel supply and standards organisations have worked together to produce Joint Industry Guidance on the supply and use of 0.50% - sulphur marine fuel released on 20 .. more
CIMAC WG7 | Statement - 2018 Fuel Incidents
In 2018, the industry experienced a series of marine fuel incidents impacting the operation of more than 100 vessels. The specialists of CIMAC WG7 Fuels have prepared a statement .. more
CIMAC WG08 | Guideline - Two Stroke Engine Cold Corrosion
The guideline aims to understand the issue of cold corrosion which has been a regular occurrence with operators of large two-stroke marine engines due to engine operation at low loads. It .. more
CIMAC WG17 | Position Paper - Gas Engine Aftertreatment Systems
The CIMAC Position Paper ‘Gas Engine Aftertreatement Systems’ has been compiled by the CIMAC WG17 'Gas Engines' members and provides an overview regarding the exhaust aftertreatment .. more
CIMAC WG07 | Guideline - ISO 8217:2017 FAQ
The CIMAC Working Group 7 Fuels has prepared and issued a guideline to provide answers to the questions that may arise with the publication of ISO 8217:2017, the latest specification of .. more
CIMAC WG07 | Guideline on the Interpretation of Marine Fuel Analysis Test Results
This guideline follows on from the CIMAC WG7 guideline No 09:2014 [1] which set out the differences between the ISO 4259 approach and that adopted under MARPOL Annex VI in respect of fuel .. more
CIMAC WG07 | Guideline on Filter Treatment of Residual Fuel Oils
The CIMAC Working Group 7 Fuels has prepared and issued a guideline on filtration of residual fuels. Traditionally, filters have been considered a safeguard for marine engines, however, a more .. more
CIMAC WG17 | Impact of Gas Quality on Gas Engine Performance
This position paper describes how gas engines are influenced by the quality of the gaseous fuel provided. This topic is becoming increasingly important as highly fluctuating renewable energy .. more
CIMAC WG07 | New 0.10% sulphur marine (ECA) fuels
New 0.10% sulphur (S) marine fuels recently introduced in the market offer an economically attractive alternative to conventional distillate fuels such as DMA. Before purchasing a new fuel product, .. more
CIMAC WG07 | Interpretation of Marine Fuel Oil Analysis Test Results with particular reference to Sulphur content
With the introduction of MARPOL Annex VI, the sulphur content of a particular fuel oil is now often the primary factor in assessing whether or not that fuel oil is acceptable for intended use. .. more
CIMAC WG08 | Future Fuel Scenarios and their impact on Lubrication
The purpose of this paper is to consider the various types of fuel, and combinations of fuels, that may be used by marine vessels through to 2025, and then to discuss the potential impacts that .. more
CIMAC WG17 | Methane and Formaldehyde Emissions of Gas Engines
Unburned Methane emissions from gas engines are of concern because of their contribution on global warming. Formaldehyde – a toxic interstage product of the Methane oxidation process – .. more
CIMAC WG17 | Information Concerning the Application of Gas Engines in the Marine Industry
Over the last few years gas-fuelled engines have become more popular also in the marine industry both for on-board power generation and propulsion duties. Whereas the use of gas-fuelled marine .. more
CIMAC WG08 | Relevance of Lubricant Flash Point in Connection with Crankcase Explosions
Crankcase explosion is caused due to the overheating of one of the cylinders in the main machinery space. The consequences of the explosion is severe and it affects the working of other engines. .. more
CIMAC WG07 | Guideline for Ship Owners and Operators on managing Distillate fuels
In the current absence of an officially accepted specification for marine fuel containing more than 0.1% v/v biodiesel, this CIMAC publication provides background information and guidance to .. more
CIMAC WG05 | Influence of Fuel Quality on Black Carbon Emissions
Discussions have started up at IMO about the need and potential for restricting black carbon (BC) emissions in the Arctic region caused by international shipping.
Especially regarding switch of .. more
CIMAC WG07 | Guideline for the operation of Marine Engines on low Suphur diesel
This document has been prepared to advise the crew, users, vessel owners, charterers, crew, fuel and lubricant suppliers, equipment manufacturers, and classification societies about the fuel .. more
CIMAC WG07 | Questionnaire
This document intends to collect information about the situations experienced where the Ignition and Combustion properties of the fuel are suspected of having influenced negatively on the .. more
CIMAC WG05 | Emission Calculation Check Guide
On 10 October 2008, the IMO Marine Environment Protection Committee at its 58th session, by Resolution MEPC.177(58), has adopted amendments to the Technical Code on Control of Emission of Nitrogen .. more
CIMAC WG02 | Use of Aluminium and alloys in Engine rooms of Category A
Since many years discussions are ongoing between CIMAC WG2 and the IACS MP with regard to the use of Alu and/or Alu-alloys in engine rooms of category "A".
Today, mainly for 4-stroke medium and .. more
CIMAC WG02 | Piping - Tightness of Pipe Connections
The presently available requirements with regard to the tightness of pipe connections for flammable, highly inflammable and potentially explosive media and fluids are clearly requesting tightness. .. more
CIMAC WG05 | Background Information on Black Carbon Emissions
This document provides the background information on black carbon emissions from large marine and stationary diesel engines. It discusses about the need and potential for restricting black carbon .. more
CIMAC WG17 | Transient Response Behaviour of Gas Engines
Recent emission regulations and the trend towards utilization of waste gases and renewable fuels have generated a rising interest in using gas engines in applications where Diesel/HFO engines were .. more
CIMAC WG07 | Fuel Quality Guide - Ignition and Combustion
Current commercial residual fuel specifications cannot reliably predict the ignition and combustion characteristics of a fuel due to lack of a suitable test parameter. They cannot therefore protect .. more
CIMAC WG05 | Requirements for Prime Mover Technique Specific Emission Limits
This document briefly explains the importance of technique specific emission regulations. Some general features of the stationary engine plant are presented, such as:
engine types & fuel .. more
CIMAC WG17 | Position Paper about the Influence of Ambient conditions on Performance of Gas Engines
Ambient conditions depend on the geographical location and may vary with time of the year. The performance of an engine is influenced by the ambient conditions. The most important ambient .. more
CIMAC WG17 | Position paper about the use of LNG as Engine fuel
LNG, liquefied natural gas, is natural gas cooled down to about –161 °C at atmospheric pressure and transported as a liquid. It is now rapidly becoming a widely used engine fuel in .. more
CIMAC WG05 | Statement EPA NPRM
Control of Emissions of Air pollution from Locomotive Engines and Marine compression-ignition engines less then 30 litres per cylinder.
This publication discusses the following issues: .. more
CIMAC WG02 | Proposal IACS Implementation UR
Subject: Implementation of new or revised UR
Background
On the occasion of the last CIMAC WG2 meeting at Vaasa in April 2005 we ocassionally learned that some UR have been revised and .. more
CIMAC WG02 | Proposal IACS EIAPP Certificates
Subject: Delivery of EIAPP Certificates
Background
Since that moment when the new IMO regulations regarding NOx came into force claims from engine builders increased. The engine builders .. more
CIMAC WG02 | Proposal IACS Attendance TAT
Subject: Attendance at Type Approval Tests (TAT)
Background: Within the last years quite some experience was gained during Type Approval Tests. We have realized that Class surveyors well attended .. more
CIMAC WG07 | Statement EPA CARB
Use of low sulphur diesel fuels in coastal waters.
CARB / EPA propose that Ocean going ships must use only distillate fuels (diesel oil) with a low sulphur content and a low content of aromatic .. more