MARINE ENGINE

IMO/EU Regulations
NOx Limit (g/kWh)
Tier Date
n < 130 130 ≤ n < 2000 n ≥ 2000
Tier I 2000 17.0 45 . n-0.2 9.8
Tier II 2011 14.4 44 . n-0.23 7.7
Tier III 2016* 3.4 9 . n-0.2 1.96
*In NOx Emission Control Areas (Tier II standards apply outside ECAs).
IMO Regulations
IMOI — Compliant with IMO emissions standards for the year 2000 as
defined by Regulation 13 of Annex VI to the International Convention
for the Prevention of Pollution from Ships, 1973, as modified by the
protocol of 1997. Applies to specific engines in vessels with a keel lay
date from Jan. 1, 2000 until Dec. 31, 2010; other rules may apply.
IMOII — Emissions data measurement is consistant with the
procedures described in Resolution 2 of the 1997 Marpol Conference
“Technical Code on Control of Emissions of Nitrogen Oxides from
Marine Diesel Engines 2008.” This engine’s exhaust emissions are in
compliance with the International Maritime Organization’s Regulation
13 of Revised Annex VI to the Marpol 73/78 Convention. Applies to
specific engines in vessels with a keel lay date from Jan. 1, 2011 until
the proposed date Dec. 31, 2015.
NST — Engines < 130 bkW are not subject to IMO regulations
EU Regulations
Commercial Craft Directive 97/68/EC (EU Stage IIIA)
This directive is in effect and applies to all propulsion and auxiliary
engines. Caterpillar has certified some engines with a rated power of
greater than 560 bkW to this standard. Most of these are to be used
for inland waterway vessels. These engines also became effective by
reciprocity agreement with CCNR Stage II, on July 1, 2007.
Central Commission for Navigation on the Rhine
Commercial Craft — CCNR Stage II regulated Diesel Engine Emissions
limits became effective July 1, 2007; this regulation is only effective for
engines with a rated power at or above 37 kW.
Engine Certification Descriptions
CC2 — Complies with CCNR Stage II
IW — Complies with EU Stage IIIA or referred to as, Inland Waterway
Commercial Craft Directive, meaning the same as Commercial Craft
Directive 97/68/EC (EU Stage IIIA)
NC — Not Certified for EU Regulations. Engines < 37 kW are not
subject to CCNR legislation.
NST — Engines < 37 kW are not subject to CCNR legislation
RCD — Recreational Craft Directive, complies with EU 94/25/EC. This
directive is in effect and applies to all recreational Engines used in
the European Union areas.
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