SOS was first transmitted in the U.S. in 1909 from the Arapahoe vessel and was later used alongside CQD when the Titanic was sinking. The U.S. officially adopted the signal after Titanic .

CQD and SOS The distress signal CQD originated from the signal CQ, expressing "seeking you," or "all stations." The signal CQ was commonly used among wireless operators -- and land-based ...

The signs are at several beaches, including Pere Marquette Beach in Muskegon and Grand Haven State Park. “It is very helpful,” Marc Moore, officer in charge at Coast Guard Station Grand Haven ...