Pair this with DistresS.O.S. Night Visual Signal to meet coastal day and night visual distress signal requirements. Complies with US Coast Guard Requirements in 46 CFR 161.013 and 46 CFR 28.145 Coastal as a day visual distress signal. Improves visibility in an emergency. Inflation chamber provides rigidity for multiple means of deployment. Applications are multiple: by swimmer; emergency rain water collection; emergency shade; floats on water's surface for increased visibility from the air. Four 30-in (76.2 cm) for easy attachment. Reinforced grommets in each corner. Toughest flag on the market.