anonymized observation data collected by semaphores Saint-Mathieu, La Chèvre and Toulinguet from 2011 to 2013

The present database contains observations for 3 semaphores placed on the Brittany coast (Saint-Mathieu, La Chèvre and Toulinguet) and for the years 2011 (Saint-Mathieu, La Chèvre et Toulinguet), 2012 (Saint-Mathieu) and 2013 (Saint-Mathieu). Raw data observations refer to data recorded 24h/24 and 7d/7 from officers of the French Navy (Marine Nationale) by contacting via radio (where possible) the boat and asking about the route of the boat itself. Name, matricule, type of boat and usage are also recorded. Sometimes also time of return and azimuth/distance of the sighting are recorded.