Air emissions - NOx

Monitoring of regulations

2.1 Conduct internal audits of equipment or energy loads that could be more efficient with smart controls, variable loads, or other means, ex. HVAC in unoccupied spaces, air compressor, or cooling pump; and/or from survey findings, make progress right-sizing or upgrading equipment, balancing loads, or similar.

2.2 Use climatology and weather forecasting to take advantage of tidal currents and avoid storms. Plan voyages to reduce running hours and idling time.

2.3 Optimize trim for energy efficiency when loading cargo and managing ballast, if carried.

2.4 Follow voluntary slow speed measures for a majority of transits in specific zones, as identified by a port, governmental authority, or regional coalition. 

2.5 Implement a preventive engine maintenance system to optimize performance.

2.6 Identify optimal engine speed or engine load for energy efficiency. Inform crew and ensure awareness of this optimal ‘economic’ speed. Transit at this speed to the extent practicable.

2.7 Implement a replacement program for LED or other energy efficiency light upgrades.

Pilot Boats and Tugs Only:

2.8 Reduce idling with dispatch scheduling and/or providing tie-up locations where awaiting tow or escort.

3.1 Complete an annual inventory of NOx emissions for the company's entire fleet, owned and chartered

Note: See Annexes 2-C and 2-D.

Fulfill 2 of the following 3 criteria:

4.1 Conduct sampling of NOx emissions on at least one of the company’s ships within the last five (5) years. The sampling test plan must be consistent within the fleet, comparable with prior tests, and a recognized methodology, such as ISO 8178 or IMO NOx Technical Code 2008.

4.2 On board one or more of the company's owned ships, install a higher tier engine than required or use and maintain on-engine or after-treatment NOx emission reduction technologies, like selective catalytic reduction (SCR) or exhaust gas recirculation (EGR), or methods that result in a 15% reduction of NOx emissions below the permitted limits.

Note: Permitted limits are published in the document ‘NOx emission permitted limits’ in the Members section of the Green Marine website.

4.3 Actively participate in research and development on reducing NOx emissions, for example – introduction of new non-combustion technologies, such as fuel cells and batteries, or new fuels; and on minimizing trade-offs between NOx reduction and other increased emissions, like CO2, N2O, or ammonia slip.    

Note: Active participation in R&D is defined as the provision of support by the participant, whether through financial means, human resources, equipment, and/or experimental shipboard trials; in partnership with an academic institution, technology developer, innovation accelerator, or government agency.

Fulfill one of the following 2 criteria:

5.1 On board the majority (50%+1) of the company's owned ships, install a higher tier engine than required or use and maintain on-engine or after-treatment NOX emission reduction technologies or methods that result in a 15 % reduction of NOX emissions per ship below the permitted limits.

Note: Permitted limits are published in the document ‘NOx emission permitted limits’ in the Members section of the Green Marine website.

OR

5.2 On board one or more of the company's owned ships, achieve a 50% or greater reduction of NOX emissions per ship below the permitted limits by installing a higher tier engine than required or by using and maintaining NOX emission reduction technologies.