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C4iSR: Maritime

Spanish S 80 AIP system passes final tests

27 February 2020
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The air-independent propulsion (AIP) system for Spain's new S 80-class submarines has now passed its final tests, with Abengoa being chosen as the supplier, Navantia announced on 26 February.

The AIP system was originally due to be integrated into all four ships during their construction, but development delays meant the decision had already been made to retrofit it to the first two when they undergo their first major overhauls.

The S 80 AIP system is based on fuel-cell technology that uses hydrogen processed from bioethanol and oxygen to generate electricity, enabling the vessel to stay under water for several weeks.

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