EPA's Marine Emissions Tools are designed to model emissions from Category 3 commercial marine vessels (CMV) given specific vessel information and operating conditions. This toolset contains two R packages:
- ShipEF, which contains functions to assign marine vessel emission factors
- ShipPowerModel, which contains functions to calculate ship propulsive power and auxiliary/boiler engine loads
See the individual package readme files for installation instructions. For information on how to use these packages, see the package documentation, vignettes, and the cheat sheets.
ShipEF and ShipPowerModel are currently in beta. A previous version of these R packages was used to develop the CMV inventories for the 2017 National Emissions Inventoy (NEI). This beta version will form the basis for the CMV inventories for the 2020 NEI. Future versions of this toolset may include other features, such as capabilities for modeling Category 1 and 2 vessels.
Even though ShipEF and ShipPowerModel are currently in beta, these tools are consistent with the EPA Port Emissions Inventory Guidance, and therefore they may be used for voluntary and research purposes, as well as to develop inventories to meet regulatory requirements. For more information on how or why to develop a mobile source port-related air pollution emissions inventory, see the Port Emissions Inventory Guidance.
The United States Environmental Protection Agency (EPA) GitHub project code is provided on an "as is" basis and the user assumes responsibility for its use. EPA has relinquished control of the information and no longer has responsibility to protect the integrity, confidentiality, or availability of the information. Any reference to specific commercial products, processes, or services by service mark, trademark, manufacturer, or otherwise, does not constitute or imply their endorsement, recommendation or favoring by EPA. The EPA seal and logo shall not be used in any manner to imply endorsement of any commercial product or activity by EPA or the United States Government.