Amphitrite is a French dual-use deep-tech company, spin-off of CNRS, École Polytechnique and Sorbonne Université, born from 10+ years of ocean research with the French Navy. Our 15+ scientists and engineers, including 7 PhDs in oceanography, AI and underwater acoustics, build a new generation of AI ocean forecasting systems fusing satellite and in-situ data. In defence, we forecast the acoustic environment in real time to give Anti-Submarine Warfare operators a tactical advantage. Validated with the French Defence Innovation Agency, DGA and SHOM, we hold five defence contracts (2026-27) in France, Canada and Singapore.