Europe’s Most Important Small-Cap Maritime Defense Company
This is Porter & Co.'s Tech Frontiers – where analyst Erez Kalir tells the story of a little-known nautical-engineering firm that he believes is set to significantly rise in price. The details of that recommendation – and the specific name of the company – are for paid-up subscribers only. To learn more about subscribing to Tech Frontiers, click here.
In 1964, German naval engineer Ulrich Gabler published a book called Unterseebootsbau – Submarine Construction. For most readers, the title alone would have been enough to induce deep slumber. But Gabler was not writing for suspense lovers, airport bookstores, or the bestseller list. Instead, his audience was a tiny universe of naval architects and submarine engineers who cared deeply about matters most of us will never think about: hull geometry, drag, acoustic signature, periscope depth, ballast systems, pressure envelopes, and the strange physics of operating machines in the least forgiving environment on Earth.
To the people who mattered in his field, Gabler’s work was not obscure but foundational. The U.S. Navy seized on the book and had it translated and distributed to American defense engineers in the 1970s. Four decades later, in the 2000s, an updated English-language edition of the original, re-titled Submarine Design, ensured that Gabler’s work remained relevant. Today, MIT’s naval engineering program – one of the best in the world – still places Gabler’s work in its core curriculum, classifying it as one of three foundational submarine design traditions: one American (Jackson), one British (Burcher), and one German (Gabler).

Ulrich Gabler didn’t approach submarine design as an ivory-tower academic, but instead as a practitioner. Early in his career, during World War II, Gabler served as chief engineer of Germany’s storied U-boat submarine corps, immortalized in the 1981 classic film Das Boot. After the war, Gabler founded Ingenieurkontor Lübeck (“IKL”), an engineering firm that dominated German submarine design in the 1950s, and whose submarine design DNA still constitutes the heart of the ThyssenKrupp Marine Systems (“TKMS”) subs deployed by the navies of Germany, Israel, Norway, and Singapore.
Our recommendation this month traces directly back to that impressive lineage.
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