The wide, multi-crew aircraft was designed around a large sensor installation, making a related ASW version conceivable. This remains speculation, framed around the 1970s and 1980s when Soviet submarine warfare drove strong demand for carrier-based surveillance aircraft.
Notable Point · 2:43:16-2:43:28
A possible anti-submarine P.139 family
The P.139 AEW airframe might have produced an anti-submarine variant during the Cold War.