Complex sentence: US Navy escape towers were known as Escape Training Tanks and from the 1930s through the 1980s were used for training in buoyant ascent, the Momsen lung, and the Steinke hood.
Split into simpler sentences: US Navy escape towers were known as Escape Training Tanks. From the 1930s through the 1980s they were used for training in buoyant ascent, the Momsen lung, and the Steinke hood.