In 1860, Martha Coston, an American inventor, revolutionized marine navigation safety with her development of the Coston flare system. Her invention utilized pyrotechnic flares for communication between ships and from ships to shore, employing a series of colored signals visible over long distances in adverse weather. This innovation significantly improved maritime communication, aiding both navies and commercial shipping. The U.S. Navy and other maritime agencies adopted the system, enhancing nautical operations and reducing accidents at sea.