Page 36: of Marine News Magazine (March 2018)

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EMISSIONS

GE V 250 EPA Tier 4 during sea trials and propulsion. Under domestic EPA requirements, the The Builder in turn has asked for an exemption based engines are required to meet EPA Tier III. That said, if upon Annex VI of the MARPOL Protocol, Regulation the vessels completing the installation travel outside U.S 13 allows for certain exemptions to IMO Tier III. Under waters and then attempt to return to the U.S. ECA they Regulation 13 - 5.2.2, which states: must meet IMO MARPOL Annex VI, Tier III Regulation “The standards set forth in paragraph 5.1.1 of this 13.5.1 under the provisions of 13.5.2.2, as enforced under regulation shall not apply to a marine diesel engine

US Law in 40 CFR Part 1043. installed on a ship with a combined nameplate die-

Here, we see the real problem: there are no 130kW to sel engine propulsion power of less than 750kW if it 600kW engines manufactured worldwide that meet those is demonstrated to the satisfaction of the Administra-

IMO Tier III emission requirements. That said; if you want tion that the ship cannot comply with the standards set to trade in the U.S. ECA you must comply. It is interesting forth in paragraph 5.1.1 of this regulation because of to note that these engine sizes are not required to meet the design or construction limitations of the ship.” next EPA Tier IV because of their size. Regulators speak to “aftermarket” compliance with SCR and again what looks Upon delivery, the U.S. Coast Guard and the Class re- to be a simple answer is not. With such a limited market, quired the barge and tug to comply. The exemption re- none of the ‘family’ engines have been tested for compli- quest is under discussion. The barge is not “self propelled.” ance with SCR installed.

We recently provided service to a client who was build-

TIER IV EPA COMPLIANCE ing an ATB unit here in the United States. In this particu-

In the larger medium to high-speed engines, we have lar build, seven engines on the barge were affected and the been very satis