A low-tech solution for stable aerial torpedo entry

What naval problem was solved by a strikingly straightforward low-technology answer?

Aerial torpedo entry was improved by attaching a stabilizing cable or drogue to the torpedo's nose.

A naval equivalent to cutting the Gordian knot was the cable attached to the heavy nose of an air-dropped torpedo. The simple stabilizing device sidestepped more elaborate attempts to control attitude and buoyancy during water entry. It used the torpedo's existing weight distribution instead of demanding a complex new mechanism. The example shows how a low-technology intervention can solve a difficult weapons-delivery problem.