All file formats which Hydromagic is able to convert to raw data files, can be imported through the raw data import wizard.
To start the wizard, right-click the 'Raw Data' folder in the 'Project Explorer' and select the 'Import Data Wizard...' option.
The first page of the wizard allows you to set the format of the file(s) we wish to import.
Since this tutorial is about importing NMEA0183 data, we select the 'NMEA0183 ASCII Log Files (*.*)' option from the drop-down list.