The LORAN-C transmitter Rantum is a transmission facility for LORAN-C on the German island Sylt near the village Rantum at 54°48′30″N 8°17′37″E / 54.80833°N 8.29361°E / 54.80833; 8.29361. It was established in the 1960s, initially using a guyed steel framework mast with a triangular cross section, approximately 190 metres tall. In 1996 this mast was replaced by a 193-metre-high mast of the same type but of a better mechanical design. The new mast is, as its forerunner, insulated from ground and has a triangular cross section. The construction, weighing 65 tonnes (64 long tons; 72 short tons), is guyed in four levels at 60.52 metres (198.6 ft), 120.87 metres (396.6 ft), 154.95 metres (508.4 ft) and 190 metres (620 ft). The transmitter was shut down on Dec 31, 2015.

• LORAN-C Transmitter (Rantum) at Structurae
• http://www.skyscraperpage.com/diagrams/?b45904

• List of masts