IARU-R1 Monitoring System reports an Over The Horizon (OTH) radar located on the island of Cyprus has been active on 21.170 MHz
The Sovereign Base Areas of Akrotiri and Dhekelia is a British Overseas Territory on the island of Cyprus.
On December 11 a radar on the island was reported as using FMCW, 50 sweeps/sec, 20 kHz wide on 21170 kHz inside the amateur band.
The International Amateur Radio Union Monitoring System (IARUMS) Region 1 December 2018 newsletter can be read at
http://www.iarums-r1.org/iarums/news2018/news1812.pdf
Reports of Amateur Band intruders can be logged on the IARU Region 1 Monitoring System Logger at
http://peditio.net/intruder/bluechat.cgi
Monitor the short wave bands on-line with a web based SDR receiver at
http://www.websdr.org/
IARU Monitoring System (IARUMS)
https://www.iarums-r1.org/