California Air Resources Board

Chapter 7 of the 2024 Carl Moyer Program Guidelines describes the minimum criteria and requirements for marine vessel projects. Local air quality management or air pollution control districts may set more stringent requirements based upon local priorities.

Eligible Project Types

• Engine repower
• Engine remanufacture
• Retrofit device
• Hybrid system
• Ship-side shore power
• Marine vessel exhaust capture and control system
• Vessel Replacement

Funding Amounts

Tables listed below are the maximum funding amounts for eligible Marine projects as described in Chapter 7 of the 2024 Carl Moyer Program Guidelines.

Maximum Percentage of Eligible Costs for Moyer Program Marine Engine Repower or Remanufacture Kit Projects for Vessels (except Commercial Fishing Vessels) Subject to the CHC Regulation 

Vessels subject to CHC Regulation Schedule for Meeting Tier 3 or Tier 4 Marine Standards (or marinized off-road Tier 4 Final + Diesel Particulate Filter (DPF) (ex: barge, crew & supply, dredge, excursion, ferry (except short-run), towboat, tugboat, CPFV, pilot, workboat, research, tank barge)). 

(1) Engines using a Family Emission Limit (FEL) or Averaging, Banking, and Trading (ABT) to meet the Tier 4 emission standards will be funded at Tier 3 engine levels. Tier 3 emission factors will be used for funding calculations. 
(2) Commercial Harbor Craft regulation, California Code of Regulations, title 17, Section93118.5(e)(12)(B)2: for engines <600 kW, if Tier 4 Marine standards are not available, and repowered after 1/1/2023 to Tier 3, vessel does not need to repower to Tier 4 marine standard when it becomes available.
(3) Tier 4 engines participating in the averaging, banking and trading program that are certified to family emission limits (FELs) higher than the applicable emission standards are ineligible to participate in the Carl Moyer Program.

Last Updated: January 28, 2025