Marine Vessels and Equipment

Upgrade or replace diesel-powered marine engines with funding from the Carl Moyer Program. This program aims to cut air pollution from heavy-duty diesel engines in California.


The Carl Moyer Program closed on Wednesday, May 18, 2022, and is not accepting new applications. Complete applications that were submitted prior to midnight (Pacific Daylight Time) on May 18 will be evaluated for eligibility.

Year 23 Funding Cycle is anticipated to begin accepting new applications when the program opens in Summer 2022. Please sign up for the Carl Moyer Notification List on the Carl Moyer Program web page to receive timely email alerts or check back on this web page for program updates. 


Project Types

Funds in the Year 22 Funding Cycle were available for the following project types:

  • Engine replacement (repower) - replace a vessel’s engine with the cleanest available emission-certified engine
  • Remanufacture kit - install an engine remanufacture kit that reduces the engine’s emissions
  • Engine retrofit - install a CARB-verified diesel emission control strategy device (case-by-case).
  • Hybrid system - install an EPA-verified hybrid system
  • Vessel Replacement - replace a vessel to a new Tier 4-or-cleaner vessel (case-by-case).
  • Ship-side shore power - retrofit a marine vessel to enable shore-power connection (case-by-case)
  • Exhaust capture and control system - install an EPA-verified marine vessel exhaust capture and control system (case-by-case)

Eligible Vessels

  • Funding is available to reduce emissions from commercial or institutional marine vessels, such as charter fishing boats, commercial fishing boats, pilot boats, work boats, and research boats.
  • Funding is available for regulated commercial marine vessels, such as barges, crew and supply vessels, dredges, tour boats, ferries, tugboats, and towboats that comply with the CARB Commercial Harbor Craft Regulation.
  • Recreational and non-diesel-fueled vessels are not eligible for funding.

Project Requirements

  • Propulsion or auxiliary engines with 25 horsepower or greater.
  • Vessels and fleets must currently be in compliance with the CA Commercial Harbor Craft Regulation.
  • Vessels and equipment must operate within California Coastal Water Boundaries and the Air District’s jurisdiction, with priority given to those operating in areas highlighted in the Air District’s Priority Community Map or in Community Air Protection communities.
  • New engines must be installed and operational at least three years prior to the compliance deadline specified by the CARB Commercial Harbor Craft Regulation.
  • Applicants must provide records documenting equipment ownership and usage from the previous two continuous years.
  • Shore power and emissions capture applications must demonstrate that the project will result in emissions reductions that are surplus to the requirements of CA air quality regulations pertaining to ports operations and at-berth engines.

Rules and Regulations

Learn more about the CARB Harbor Craft regulation or contact ARB staff by email: or phone: 1-888-442-7238.

For information about the CARB Shore-Power regulation and other marine-related regulation, visit the CARB Ports Activities webpage.

How to Apply

The Year 23 Funding Cycle will begin accepting new applications when the program opens in Summer 2022. Please sign up for the Carl Moyer Notification List at the bottom of the Carl Moyer Program web page to receive timely email alerts or check back to this web page for program updates. 

Workshops and Events

View the Calendar for upcoming workshops, events, and deadlines.

Additional Information

Learn more about marine vessel and equipment funding, including project type details, regulatory information, and application requirements.

Contact Us

Eliza Kane
Staff Specialist, Strategic Incentives


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Last Updated: 5/19/2022