- MTU Series 4000 (2,2 MW everyone)
- Héraklès multi-purpose passive electronically scanned array range + 300 km (air) 80 km (surface)
- Thales STIR EO MK 2 fire control radar
- CAPTAS-4 towed-array sonar
- UMS 4110 CL hull-mounted sona
- 1 * 76 mm Super Rapid gun
- 3 * 20 mm Narwhal remote weapon systems
- 32-cell SYLVER A50 VLS for Aster 15 and Aster 30 air defense missiles
- 8 * MM40 Exocet Block 3/3c anti-ship missiles
- 2 * B-515 twin launchers for MU90 torpedoes
- 1 * NH90 helicopter
Alsace (D656) is an Aquitaine-class frigate of the French Navy developed through the FREMM multipurpose frigate program. She is the first of two air-defence variants of the class known as FREMM DA (Frégate Européenne Multimissions de Défense Aérienne) in the program.
Original plans were for 17 FREMM hulls to replace the nine D'Estienne d'Orves-class avisos and nine anti-submarine (ASW) frigates of the Tourville and Georges Leygues classes. In November 2005 France announced a contract of €3.5 billion for development and the first eight hulls, with options for nine more costing €2.95 billion split over two tranches.
Following the cancellation of the third and fourth of the Horizon-class frigates in 2005 on budget grounds, requirements for an air-defence derivative of the FREMM called FREDA were placed – with DCNS coming up with several proposals. Expectations were that the last two ships of the 17 FREMM planned would be built to FREDA specifications; however, by 2008 the plan was revised down to just 11 FREMM (9 ASW variants and 2 FREDA variants) at a cost of €8.75 billion. The 11 ships would cost €670 million each in FY2014, or €860m including development costs. Subsequently, the class was further reduced to a total of eight ships, though both air-defence variants (Alsace and Lorraine) were retained.
Alsace and her sister ship retain most of the armaments and sensors of their ASW sister ships within the FREMM class. However, the ships have enhancements related to air defence including a more powerful Thales Herakles multi-function radar with more transmitter modules and additional wave-forms and search modes for long range air defence. Additional communications systems, consoles in the combat information centre and berthings for additional personnel are also integrated into the ship. A reinforced bridge structure is incorporated to accommodate the enhanced weight of these systems. The ships also incorporate Sylver A50 vertical launch systems permitting them to carry both MBDA Aster 15 and/or 30 surface-to-air missiles. On the two AAW variants, the Sylver A70 launch systems (used for land-attack cruise missiles on the ASW variants) are removed to provide space for fitting double the number of A50 cells for Aster SAMs.
Alsace was developed as part of a joint Italian-French program known as FREMM, which was implemented to develop a new class of frigates for use by various European navies. Constructed from 2016. On 18 April 2019, the frigate Alsace was launched. She began sea trials in October 2020 and was delivered to French Navy in April 2021. The ship was declared fully operational on 22 November 2021.
From 18 November to 2 December 2021, Alsace took part in Exercise Polaris 21 in the western Mediterranean Sea.