In contribution to the European Union Mission Restore our Oceans and Waters by 2030, FLOW studies young generations’ relations and engagement with oceans and waters2. Through the FLOW project, our research hopes to gain better insights into how European youth shape and hold their expectations about the futures of oceans and waters, and the relations, values and emotions they exhibit when considering the present and future states of our waters. FLOW aims to achieve this by providing strategic foresight research on the human-water relationships of young generations. One central task of this foresight study is to conduct horizon scanning research. Horizon scanning research activities focus on changing human-water relations by examining a variety of cultural sources for novel signals, drivers of change, popular and peripheral expectations, and hopes and fears of younger generations. As a central part of the horizon scanning, signals are collected through various modes of research. Signals are understood as small pieces of information, data, representations, and other knowledge artifacts that introduce or discuss a little known topic that is indicative for change. This deliverable outlines how and why signals are identified and provides a list of those streams for relevant cultural sources that will be followed throughout the horizon scanning composing the project’s Mixed-Media Research Corpus.