ION Geophysical Corporation (OTC:IOGPQ) announced today that its climate-smart, digital platform, Marlin SmartPort™, has successfully fulfilled its role to help monitor greenhouse gas emissions in the Data-Led Emissions Management (D-LEMA) project. The D-LEMA project is part of the Clean Maritime Demonstration Competition (CMDC) launched in March 2021, funded by the Department for Transport, and delivered .