CIMAC Guidelines

The following CIMAC Guidelines have been prepared by the CIMAC Working Groups and can be published on responsibility of the WG without any further decision process within CIMAC. CIMAC Guidelines give information on certain technical aspects and shall enable the reader to understand a topic better and / or to evaluate it from technical perspective.  .

The Guidelines can now be downloaded as pdf-files by clicking on the description of each entry below or via the 'Download' option on the left hand side or from the Technical Paper Database. The downloads are free of charge for all.


CIMAC Guidelines No. 10
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 intends .. more
CIMAC Guidelines No. 9
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 marine .. more
CIMAC Guidelines No. 8
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 Guidelines No. 7
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 Guidelines No. 6
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 Guidelines No. 5
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 Guidelines No. 4
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 Guidelines No. 3
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 Guidelines No. 2
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 Guidelines No. 1
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
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