A ramark, syllabic acronym for radar marker, was a type of

radar beacon Radar beacon (short: racon) is – according to ''article 1.103'' of the International Telecommunication Union, International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "A transmitter-receiver associated with a fi ...

used to mark maritime

navigation Navigation is a field of study that focuses on the process of monitoring and controlling the motion, movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navig ...

al hazards. Ramarks are no longer in use. Ramarks are a non-directional, continuously transmitting radar beacon which indicate the bearing to a navigational hazard when viewed on a radar plan position indicator (PPI) display. Some ramarks transmit a unique set of

Morse Morse may refer to: People * Morse (surname) * Morse Goodman (1917-1993), Anglican Bishop of Calgary, Canada * Morse Robb (1902–1992), Canadian inventor and entrepreneur Geography Antarctica * Cape Morse, Wilkes Land * Mount Morse, Churchi ...

characters, which are visible on the PPI display as dots and dashes along the bearing of the ramark. Ramarks are no longer used in the United States. They have been phased out in favor of more advanced racons (radar beacons) which indicate both the location and the bearing of the hazard.{{Cite web , title=Radar Beacons {{! Navigation Center , url=https://navcen.uscg.gov/radar-beacons , access-date=2024-07-17 , website=navcen.uscg.gov

References

Navigational aids Radar de:Radar Beacon#Ramark