In 1859, the ‘ɪᴄᴛɪɴᴇᴏ ɪ’ made its public presentation to shareholders, the press and general public📸. He managed to sail the boat completely submerged for 02:20 hours at a depth of 20 m, and to bring it back to the surface. Something unbelievable had just happened.

🐦🔗: https://nitter.eu/IdeasPowered/status/1567045171853905921