The latest addition – the C-Researcher – is claimed to be the world's first fully-transparent, 3-person underwater craft capable of diving to the formidable depth of 1,700 meters (5,577 feet).

The C-researcher has been added to the Dutch submersible-building company's range specifically to support the needs of the scientific community. In this vein, it comes with a wide variety of options to bolster its research capabilities. These include everything from manipulator/sampler arms through to imaging sonar, a HD video camera system, and parametric sub-bottom profilers. These instruments help measure water conditions, create 2D/3D underwater maps, and allow analysis of the seabed in this rarely seen environment.

The most prominent feature of the C-Researcher, however, is its exceptionally large acrylic bubble that is the crew compartment. With room for two scientists/observers and one pilot, the compartment offers panoramic views of the deep ocean. UBW claims that this spherical acrylic pressure hull is the first of its kind rated to such depths.