![French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a](https://i.redd.it/ynrzm4lju7591.jpg)
French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a
![French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a](https://i.redd.it/2ilsaf1ku7591.jpg)
French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a
![French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a](https://i.redd.it/yrk54gyiu7591.jpg)
French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a
![French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a French cruiser submarine Surcouf; the largest submarine in the world when built - she had twin 8" guns in a trainable turret, a deployable and recoverable airplane with water proof hangar, a](https://preview.redd.it/ggk4n1u1gh191.jpg?width=640&crop=smart&auto=webp&s=ad057ccd76b46a989061573504b3ce56e394df12)