
Carl Moyer Program: Marine Vessels
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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
- Zero-Emission and Zero-Emission Capable Hybrid systems
- 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)).
Baseline Engine | Replacement Engine | Maximum Percentage Eligible |
Tier 0,1 | Tier 3 (2) | 50% |
Tier 0,1 | Tier 4(1) | 85% |
Tier 2 | Tier 3 (2) | 80% |
Tier 2, | Tier 4(1) | 85% |
Tier 3 | Tier 4(3) | 85% |
(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.
Maximum Percentage of Eligible Costs for Moyer Program Marine Engine Repower or Remanufacture Kit Projects for Commercial Fishing Vessels Subject to the CHC Regulation
Commercial Fishing Vessels are subject to Commercial Harbor Craft Regulation schedules for meeting Tier 3 standards.
Baseline Engine | Replacement Engine | Maximum Percentage Eligible |
Tier 0,1,2 | Tier 3 | 85% |
Tier 0,1,2 | Tier 4(1) | 85% |
Tier 3 | Tier 4(2) | 85% |
(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) 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.
Maximum Percentage of Eligible Costs for Moyer Program Marine Engine Repower or Remanufacture Kit Projects for Vessels Not Subject to the CHC Regulation
Vessels not subject to CHC Regulation Schedules for Meeting Tier 2 or Tier 3 or Tier 4 Standards (ex: registered historic vessels and dedicated emergency use vessels)
Baseline Engine | Replacement Engine | Maximum Percentage Eligible |
Tier 0,1,2 | Tier 3 | 80% |
Tier 0,1,2, | Tier 4(1) | 85% |
Tier 3 | Tier 4(2) | 85% |
(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) 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.
Maximum Percentage of Eligible Costs for Other Moyer Program Marine Projects
Project | Maximum Percentage Eligible |
CARB Level 3 Retrofit Device | 85% |
Ship-side Shore Power | 85% |
Vessel Replacement | 85% |
Zero-Emission or Zero-Emission Capable Hybrid Repower | 85% |
Purchase of an CARBverified marine vessel exhaust capture and control system | 85% |
Last Updated: January 28, 2025