Ships navigating near offshore wind farms are encountering a hazard that was never there before. Thick sea fog has been forming downwind of turbines in waters that used to be clear. Ships navigating near offshore wind farms are encountering a hazard that was never there before. Thick sea fog has been forming downwind of turbines in waters that used to be clear. The official program for shipping safety around wind farms has been dubbed MOSWOZ (Monitoring and Research Programme Shipping Safety Offshore Wind Farms).