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.

Funding is offered on a first-come, first-served basis until all funds have been spent. Applications must be determined to be complete to be considered for funding.

Project Types

Funds are available for the following project types:

  • Engine replacement (repower) - replace a vessel’s engine with a newer, lower-emission-certified engine
  • Remanufacture kit - install an engine remanufacture kit that reduces the engine’s emissions
  • Engine retrofit - install an ARB-verified diesel emission control strategy device.

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.
  • Limited funding is available for regulated commercial marine vessels, such as barges, crew and supply vessels, dredges, tour boats, ferries, tugboats, and towboats subject to the ARB Harbor Craft Regulation.
  • Recreational vehicles are not eligible for funding.


Shore-power projects that reduce emissions from a ship at berth may also be eligible for funding. Only applicants that can demonstrate that the project is not required by the ARB Shore Power Regulation are eligible. Shore power project applications will be considered on a case-by-case basis.


The following marine equipment is generally eligible for funding; however, you must check the rule section below to make sure your project qualifies:

  • Propulsion or auxiliary engines with 25 horsepower or greater.
  • Vessels not subject to the ARB Harbor Craft Regulation compliance requirements or currently in compliance with their requirements.
  • Vessels and equipment operating within California Costal 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 (PDF).
  • New engines must be installed and operational at least three years prior to the compliance deadline specified by the ARB Harbor Craft Regulation.
  • Be able to provide records documenting equipment usage from the previous two continuous years.

Rules and Regulations

Verify eligibility by identifying the regulations your equipment is subject to.

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

How to Apply

  1. Determine your equipment’s eligibility for this program.
  2. Identify the project type for your marine vessel and engines.
  3. Gather the required information about your marine vessel, engine(s), and replacement engine(s) or equipment upgrades.
  4. Apply for funding online.
  5. Contact the Air District if you have any questions during the application process.

Workshops and Events

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

Additional Information

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

Contact Us

Yu Zhang Liu
Administrative Analyst, Strategic Incentives


Contact Us

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Last Updated: 5/20/2015