During the last year of World War II the once surface-bound diesel-electric U-boat ushered in the age of ‘total undersea war’ with the introduction of an air mast, or 'snorkel' as it be...więcej »
During the last year of World War II the once surface-bound diesel-electric U-boat ushered in the age of ‘total undersea war’ with the introduction of an air mast, or 'snorkel' as it be...więcej »