Research into maritime history using digital tools is a growing field, with projects that in recent years have focused on the role of sea spaces in the dynamics of globalisation on an economic and juridical level as well as on a cultural level, with respect to the circulation of knowledge. In this introduction to our special issue, we offer some historiographical observations on the codification of knowledge in seafaring practice, emphasising how the use of digital tools to process and represent primary sources may encourage historians to formulate new questions about the relationship between European culture and the sea during the early modern age. In order to present the articles in this issue and the original contribution they make to the field, we also focus on the historical and cultural significance and methodological challenges posed by primary sources such as logbooks. We illustrate how the analysis of logbooks in a digital environment such as Global Sea Routes (GSR), a project conceived and coordinated by Guido Abbattista, can foster a better understanding of the role of routine navigations in early commercial globalisation.