| Summary: | Submersibles are limited in depth by the strength of the pressure
hull. The pressure hull, in turn, is limited in strength by the properties
of the material used in fabrication, construction techniques, and by the
weight of material used in construction. Once the ballast weight has been
taken up in hull weight, a limit is reached in depth. To go deeper "with the
same^payload, the hull must be enlarged or size may be held constant, the
hull strengthened and flotation material attached to support the extra
weight. Either of these methods, enlarging the hull or adding flotation,
increases size greatly as depth is increased. This thesis is a study of total vehicle size versus depth for
weight -limited deep submersibles with and without buoyancy material
attached.
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