A brief correction to my post above: The four ZPG-3W (Z = lighter-than-air; P = patrol; G=Goodyear (manufacturer)) non-rigid airships delivered to the U.S. Navy were assigned to Airship Airborne Early Warning Squadron 1 (ZW-1), which was split-based at NAS Lakehurst, NJ and NAS Glynco, GA. As the squadron name implies, these were AEW assets, not ASW assets. It was used to fill radar gaps in the North American early-warning network during the Cold War between the Contiguous Barrier and the Inshore Barrier. The popular name for the ZPG-3W was Vigilance. The ZPG-3W was unique in that the huge antenna for the early warning radar was enclosed inside the helium-filled envelope. The airships were equipped with a complete CIC, including radar operators and air intercept controllers. The specially designed and built AN/APS-70 Radar with its massive 42 ft (12.8 m) internal antenna was the best airborne radar system built for detecting other aircraft because its low frequency penetrated weather and showed only the more electronically visible returns.
And now you know...the REST of the story!