The T-class cross-section shows an evolutionary design rather than a clean break with earlier British submarines. Its form retains features associated with the L, O, and P boats, and it uses saddle tanks instead of a double hull. The discussion places it within a 1920s transition away from the First World War emphasis on surface speed and toward better underwater performance. Opening here lets viewers see how a new class could preserve older construction choices while adapting to the submarine's growing underwater role.
Notable Point · 25:54-27:07
The T class carried older features into an underwater design shift
The T-class hull carried features from earlier British boats into a period when underwater performance was becoming more important than surface speed.