How could high-speed aircraft drop torpedoes in a harbor?

How could torpedoes be adapted for shallow-water drops from high-speed monoplanes?

A breakaway tension-wire system remained possible, and parachute-assisted entry was another likely solution.

The British device was a tension wire that broke away from the aircraft rather than a retaining cable. Because it separated from both aircraft and torpedo, it could still shape the weapon's attitude during a relatively high release without remaining attached. A parachute system offered another way to slow and control water entry from a fast monoplane. Both approaches addressed the same problem of preventing a torpedo from diving into the harbor bottom before leveling out.