An Orthogonal Netted Radar System (ONRS) is a networked system consisting of multiple radars, each of which uses an orthogonal set of coding waveforms, and operating at the same carrier frequency. ONRS can simultaneously operate in a monostatic and a multistatic mode, and thus possesses the advantages offered by both a monostatic and a multistatic radar system. The principles and structure of ONRS are described in this paper. The detection schemes using ONRS and an initial performance analysis is carried out.