International Air Pollution Prevention Certificate

Here is the first of two ship certificates associated the last Annex of MARPOL; an annex  that aims to reduce pollution of the air above vessels.

For those visiting this blog for the first time, here is a link of where to find information about ship certification on other websites.

A Handy Revision Guide

IAPPC keeping the air clean

This is the final part of environmental protection contained within MARPOL. Clean air is the topic of Annex VI of the Convention.

 Click here for the IMO page on air pollution>

Why is the certificate required?


Regulation 5 of Annex VI of MARPOL.


Which ships must carry the certificate?

Every ship of 400 gross tonnage and above.

What emissions are covered by the certificate?

  • Ozone depleting substances 
  • Nitrogen oxides 
  • Sulphur oxides (SOx) and particulates
  • Volatile organic compounds (VOCs)
  • Shipboard incineration 

 What Surveys are required?

  • An initial survey
  • A renewal survey at intervals not exceeding five years
  • An intermediate survey
  • An annual survey
  • An additional survey

What information in contained on the certificate?

Particulars of ship

  • Name of ship
  • Distinctive number or letters
  • Port of registry
  • Gross tonnage
  • IMO Number
  • A statement that the survey shows that the equipment, systems, fittings, arrangements and materials fully comply with the applicable requirements of Annex VI of MARPOL
  • Completion date of survey on which the Certificate is based

The Supplement to the IAPP certificate

This must be attached to the Certificate, and contains sections on:

1 Particulars of ship


2 Control of emissions from ships

2.1 Ozone depleting substances (regulation 12)

This includes a system list


2.2 Nitrogen oxides (NOx) (regulation 13)

This includes atable of marine diesel engines with their tiers


2.3 Sulphur oxides (SOx) and particulate matter (regulation 14)

2.4 Volatile organic compounds (VOCs) (regulation 15)

This includes details of any Vapour collection system and the  VOC plan


2.5 Shipboard incineration (regulation 16)

2.6 Equivalents (regulation 4)


What record book is required to be kept?

Each ship  which has rechargeable systems that contain ozone depleting substances shall maintain an Ozone Depleting Substances Record Book.

What engines are require compliance with the NOX regulations?

Marine diesel engines with a power output of more than 130 kW installed on a ship, but does apply to  diesel engine intended to be used solely for emergencies, or solely to power any device or equipment intended to be used solely for emergencies on the ship on which it is installed, or installed on the ship’s lifeboats.


What is the tier of an engine?


The ‘Tier’ is the NOX weight per per KWH and is dependent on the date of construction of a ship  and its operating area


  • Tier I   2000-2011
  • Tier II 2011 after
  • Tier III in an emission control area 

 Click here for the IMO page on NOX emissions>

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Click here for the IMO page on Emmision Control areas>

Some handy links

MSN 1819 Prevention of air pollution from ships

MGN 386 Survey and Certification Requirements for the Merchant Shipping (Prevention of Air Pollution from Ships) Regulations 2008 – Additional Guidance  

 US EPA guidelines

European Commision webpage on marine air pollution

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