In the event that you have misplaced your calibration certificate, there is a convenient solution available. Simply access the calibration portal at www.portal.rivertrace.com and proceed to register your device using the serial number as well as the vessel IMO number. By doing so, you will be able to effortlessly retrieve a digital copy of the certificate. In the rare instance that you encounter any difficulties during this process, please do not hesitate to reach out to us at portal@rivertrace.com.