VHF omnidirectional range
Although other types of communication have mostly replaced wireless telegraphy since its introduction over 100 years ago, it is still used by amateur radio operators, as well as by some military services. A CW coastal station, KSM, still exists in California, run primarily as a museum by volunteers, and occasional contacts with ships are made. Radio beacons, particularly VHF omnidirectional range (VOR) in the aviation radio navigation service, and "placeholders" for commercial ship-to-shore systems, also transmit Morse but at very slow speeds.