Air emissions - NOx

Monitoring of regulations

2.1 Implement a systematic control policy for documenting fuel (e.g. Bunker Delivery Notes (BDN), best practices application, or any other proof of the control policy in place). BDN should refer to ISO 8217:2017 tables at least.

Note: BDN must be retained, and annual consumption notes must be kept for each ship.

2.2 Plan voyages and stopovers using decision tools based for example on climatology and weather forecasting to reduce/optimize energy used for each voyage.

2.3 Optimize trim for energy efficiency when loading ships and barges.

2.4 Implement a preventive engine maintenance system to optimize performance.

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

2.6 Implement a program for energy efficiency upgrades (e.g., lighting, heating/cooling).

2.7 Conduct an internal surveys for equipment or energy loads that could be more efficient with smart controls, variable loads, or other means, e.g., 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.

Pilot Boats and Tugs Only:

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

3.1. Complete an annual inventory of NOx emissions for the company’s entire fleet.

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

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, including amendments and published guidelines.

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 Annex 2-E.

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 trial; 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 representing at least 30% of the gross tonnage) 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.

Notes:

-Permitted limits are published in Annex 2-E.

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.