Deep-Diving Submarine Hydrodynamics 339 
Aluminaut can only be ballasted to be some 500 pounds overweight and with that overweight 
its descent to 15,000 feet would take some four and one-half hours. Therefore, the vertical 
descent shown in Fig. 12 corresponds to a very modest speed where oscillations do not 
occur, and where the conditions are well removed from resonance. This is why we were 
primarily concerned with the ascent condition in the investigation. 
