About this product This beacon complies with all u.S. Coast guard requirements for "Night visual distress signals" as found in the code of federal regulations. Coast guard requirements for daytime signaling. This beacon light flashes a bright "Sos" distress signal in morse code. It flashes 2 x longer than the uscg continuous run time requirement and maintains a constant light intensity 2.5 x longer than the uscg requirement. Never even opened