What the Fairey Spearfish's remote turret was meant to provide

Why was the Fairey Spearfish designed with a remote-control turret?

It was expected to work and to give the aircraft a wider defensive sphere.

The Fairey Spearfish's remote turret was intended to widen the aircraft's defensive sphere without placing a gunner directly in the mounting. Remote control promised a useful field of fire while keeping crew and equipment inside the airframe. The idea should have worked in principle. The aircraft's failure to reach operational service means the promised defensive benefit was never demonstrated under combat conditions.