The P-19 "Danube" (Russian: "Дунай") 1RL134 (also referred to by the NATO reporting name "Flat Face B" in the west) is a 2D UHF radar developed and operated by the former Soviet Union.

This new radar completed state trials and was accepted into service with the Soviet Air Defence Forces from 1974.

[2] The P-19 like the previous P-15 was designed to detect aircraft flying at low altitude and came to be associated with the S-125 "Neva" anti-aircraft system (NATO reporting name SA-3 "Goa").

[5] The armed forces of the Czech Republic described the P-19 as having "outstanding mechanical parameters, simple maintenance, overall reliability and multifunctionality".

[1] P-19MA/P-190U[7] – ground-based long-range VHF surveillance radar P-180U is offered as the modernized follow-on to its prototype, the analogue P-19.