Mini-Biographies Cornelis Drebbel

Cornelis Drebbel Genius inventor  for his time that marked a before and after in diving, built the first navigable submarine in 1620 while working for the British Navy. the design was from the inventor William Bourne who made it in 1578, the submarine was build with woo It seems a small thing but for the technology of their time it was a challenge to keep the ships afloat, imagine diving to 20 feet  for more than 3 hours Between 1620 and 1624 Drebbel successfully built two submarines, each one larger than the previous.

The final model had 6 oars and could carry 16 passengers. This model was shown to King James I in person and several thousand Londoners. Drebbel even took James in this submarine on a test dive under the Thames, making James I the first monarch to travel underwater and in a submarine, This submarine was tested many times on the Thames, but could not attract enough enthusiasm from the Admiralty and was never used in combat, which I think is a huge mistake, what do you think?