According to the website, the app works like this: the entire Mediterranean Sea is divided into a grid of millions of small, square plots, and each user is assigned a single plot on the grid. From a smartphone (during their lunch break perhaps) they can monitor their assigned plot for signs of migrants in distress. If they see something that resembles a migrant-filled vessel, they simply tag it and enter a description of what they see (in the demo the user types, "possibly a dinghy"). Then a report, including the GPS coordinates of the vessel is sent to the Migrant Offshore Aid Station (MOAS), an organization that has saved thousands of migrants since it began work in 2014. With the data from I SEA, MOAS can, in theory, launch a rescue mission.