OVERVIEW: Surface Wave-OTH (SW-OTH) radars is an over the horizon surface and air search radar.

DETAILS: The designation of China's SW-OTH is not known, but reliable reports suggests that there are at least two systems in operation, with one ranged over the Taiwan Straits.

The transmitter is located at 27� 46� 58.70� North, 120� 45� 54.41� East, whilst the receiver is approximately 3km southwest at 27� 45� 26.88� North, 120� 45� 04.98� East.

NOTES: IOC for the SW-OTH is estimated to be 2003. The absolute range of the SW-OTH is dependent upon atmospheric conditions, system power and the time of day.

SOURCES: Air Power Australia. "PLA Air Defence Radars." Accessed December 1, 2013. http://www.ausairpower.net/APA-PLA-IADS-Radars.html#mozTocId88569.