Bathyscaphes are deep-sea diving submersibles that are designed to explore the depths of the ocean. Synonyms for bathyscaphes include deep-sea submersibles, underwater vehicles, oceanographic submersibles, and deep-diving vehicles. These terms all refer to the same type of vehicle that is used for exploring and studying the ocean at great depths. The technology used in bathyscaphes has improved over time, allowing for greater depths to be reached and more detailed observations of the ocean to be made. Synonyms for bathyscaphes are useful for scientific communication as they can add depth and variety to written or spoken discourse.