Design and operation of torpedo tubes installed on German U-Boats during WWII did not differ greatly from other such designs in the world. They used pressurized air to launch the torpedo and automatic venting after the launch.
These quarantinable diseases include cholera, diphtheria, infectious tuberculosis, plague, smallpox, yellow fever, viral hemorrhagic fevers, severe acute respiratory syndrome, and influenza caused by novel or reemerging influenza viruses that are causing or have the potential to cause a pandemic.
Medical conditions can exist as either subclinical diseases or clinical diseases. Often, subclinical diseases will become clinical diseases in time. Subclinical diseases are conditions where the disease is identifiable with laboratory testing or imaging but have no outward signs or symptoms. Screening programs are designed to identify subclinical conditions before they become problematic. This allows for early treatment and, hopefully, limited damage to the body. Hypothyroidism and diabetes are both examples of conditions with subclinical and clinical disease states.