The QH-50 DASH as a destroyer's remote ASW weapon

What was the thinking behind the QH-50 DASH anti-submarine drone?

It let small FRAM destroyers deliver torpedoes beyond the ship despite lacking space for a conventional ASW helicopter.

The QH-50 DASH arose from the FRAM programme's need to give older American destroyers an airborne anti-submarine weapon. Those ships could not accommodate the Navy's conventional ASW helicopters, but they could fit the smaller drone and its hangar. DASH could carry a torpedo or depth charge to attack a submarine beyond the ship. An example aboard Allen M. Sumner illustrates the compact installation. The corrected reliability estimate is a failure rate below 50 percent, with Japanese operations described as more successful, although no precise comparison is supplied.