Hi folks!
One of the Viggen’s (often) overlooked and obscure roles is reconnaissance, also referred to as “recce”. Naval reconnaissance was one of the primary roles of the SF-37 and SH-37 (aerial reconnaissance & maritime patrol variants of the Viggen) during the Cold War period, especially since Sweden and the Soviet Union were separated by the Baltic Sea.

Within the DCS environment, recce can actually have a useful role within a multiplayer environment. The Viggen’s radar can determine the position, course and speed of ships at sea and store this information with a timestamp within the flight computer. You can then relay this information to friendly elements and make their life much easier since they will have a good idea of where the targets are.
The operation of the AJS-37 is highly dependent on preset waypoints, therefore there is a significant advantage to sending recon target coordinates to other Viggenpilots in multiplayer. Sending coordinates over the radio allows your friends to plug in the coordinates and have a flight plan up and running in no time, which will substantially minimize their workload.
The SPA (Spaning, Reconnaissance) Master Mode is used for two main purposes:
Feel free to consult the attached pdf to see the draft.