This article will give an overview to the development, manufacturing process and certification of the manned submersible ICTINEU 3, a work class vehicle with high capabilities for research, ocean observation and underwater intervention, but also suitable for filming and leisure. It has been designed for 1.200 meters depth and a crew of three: one pilot and two observers (passengers) with certification and classification by Germanischer Lloyd. The challenge was to achieve a very small and lightweight but at the same time versatile and highly operational vehicle, with the aim to improve the capabilities of existing submersibles in this depth rate. The result is a new generation of manned submersible, a compact vehicle of only 5300 kg, with no need for syntactic foam, that can be easily operated from most research vessels and incorporates outstanding innovations such as a lithium-ion-polymer battery system that will provide the vehicle with a high power capacity.
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