Digital Arts on the British Waterways  This boat book documents our journey on our narrowboat ‘Quintessence’ and the development of the boattr prototype in collaboration with MAZI (for “together” in Greek), a Horizon 2020 research project. Boattr connects narrow boats to the ‘Internet-of-Things’ and allows for open wireless mesh-networking within the narrow boat community, by using affordable microcomputers. The main goal of this project is to provide technology and knowledge that aims to 1) empower those narrow boats who are in physical proximity, to shape their hybrid urban space, together, according to the specificities of the respective local environment, and 2) foster participation, conviviality, and location-based collective awareness of the canals. This is an edited collection of assembled and annotated boat logs, photographs and video essays, manifested, in a scholarly gesture, as a ‘computer book‘.