A dark 1940s-style shrimp-folk civil defense poster showing a helmeted warden shielding a lantern above a blackout reef city crossed by searchlights.
A shielded lantern turns civil-defense blackout into an image of public vigilance.

Blackout over the Home Reef

Restraint, severe silhouette, and disciplined searchlight diagonals give the poster its authority over the darkened home reef.