PIRAZ in the Gulf of Tonkin – NSG’s Role (Guest Post)

PIRAZ (Positive Identification Radar Advisory Zone), more commonly known by the callsign “RED CROWN,” was the most important station given to ships of the Cruiser/Destroyer force and was responsible for control of Navy airstrikes against North Vietnam. RED CROWN frequently controlled Air Force strike packages as well, and many USAF pilots preferred working with RED CROWN, a testament to the professionalism of whatever ship was assigned such duties.

PIRAZ as a concept was introduced in 1966. In late April and early May 1966 the SAR forces in the Northern Gulf of Tonkin were augmented by the USS Topeka (CLG-8) whose task was to evaluate the concept of one ship performing the following functions within a designated zone in the Gulf of Tonkin: