DOE invites input from the public regarding currently lacking data and technologies for characterization of marine and hydrokinetic (MHK) and offshore wind energy resources in support of deployment of wind and MHK technologies. For MHK power, comments regarding the advancement of wave and tidal resource characterization and data gathering for characterization of far-field hydrological and wave environment interactions with MHK energy devices are specifically requested. For wind power, comments regarding research and observation activities and partnerships for offshore wind energy resource characterization to complement, augment, or expand upon ongoing and planned offshore wind meteorological and oceanographic (metocean) data activities are specifically requested. The sole purpose of this Request for Information (RFI) is to gain input from industry, academia, local, state and federal government agencies, and other offshore wind and marine and hydrokinetic power stakeholders. The information gathered with this RFI will be used to help inform future strategic considerations and will inform the Wind and Water Power Program?s research and development portfolio with regards to offshore wind and marine and hydrokinetic resource characterization efforts. This does not constitute a request for specific project proposals. DOE will not pay for information provided under this RFI and there is no guarantee that future funding opportunities or other activities will be undertaken as a result of this RFI. The full Request for Information (RFI) is posted on the EERE Exchange website at https://eere-exchange.energy.gov. Information on where to submit questions regarding the content of the RFI and where to submit questions regarding the EERE Exchange system can also be found on the EERE Exchange website.