A first version of an app, called the BioProtect CO2 Calculator, will be developed and deployed to vessel operators in the Norway and Iceland DSs. This app will calculate CO2 emissions during fishing operations. It will use information about the vessel and gear characteristics, the fuel, lubricant, and coolant used, and the weight of the catch. The app will calculate the kg of CO2 per kg of landed fish and offer simple reporting and graphing features.