The FC/ASW ("Future Cruise/Anti-Ship Weapon"), FMAN/FMC ("Futur missile anti-navire/Futur missile de croisière" in French) or SPEAR 5 is a new generation missile programme launched by France and the United Kingdom in 2017 to succeed their jointly-developed Storm Shadow/SCALP as well as their respective Exocet and Harpoon anti-ship missiles. Equally funded by both countries, the project is led by European missile manufacturer MBDA and is a product of the close defence relationship set out between both nations by the Lancaster House treaties. In June 2023, it was announced Italy would be joining the program.
In 2017, an agreement for the launch of a concept phase of the programme was signed between the two countries and, in March 2019, MBDA announced the key review of the programme was successfully completed in cooperation with the French Defence Procurement Agency (DGA) and the British Defence Equipment and Support (DE&S).
On 18 February 2022, an agreement and associated contracts signed by the head of the DGA, his British counterpart and the CEO of MBDA confirmed the launch of the preparation works for the FC/ASW.
The program appears to now be pursuing two complementary missile concepts: a low observable subsonic cruise missile and a supersonic highly manoeuvrable missile; with the apparent discontinuation of a hypersonic solution.
Development
CVS401 'Perseus
Unveiled in 2011 at the Salon du Bourget in Paris, Perseus or CVS401 Perseus (named after the Greek hero Perseus) was a concept study undertaken by MBDA for a stealth hypersonic cruise missile designed in consultation with the Royal and French Navies and was produced by ten engineers working on the design for six months.
The Perseus was to be approximately in length, had a weight of around and be powered by a ramjet motor. The payload consisted of one main and two subsidiary warheads which could either directly contribute to the overall impact or be ejected from lateral bays before the missile reaches its target, in effect acting as submunitions. This unique feature would allow a single Perseus to either strike several targets in the same general area or to strike a single large target (such as an aircraft carrier) in several different areas simultaneously, with the aim of maximising damage.
"In this case, a linear attack pattern could be selected, munitions striking the forward, centre and aft sections simultaneously. If a unitary blast is required, then the effectors remain on board the parent missile to add their blast effect to the central warhead."
Two types of attack profiles were envisaged: a high-altitude approach, for engaging land-based targets; and a sea-skimming low-altitude approach terminating in a 'pop-up' engagement when dealing with surface threats like enemy warships.
The missiles "skimming the sea at wave top" followed by a pop-up manoeuvre would only allow an estimated 3 second response time for enemy warships.
The conceptualised sensor suite consisted of: A multi-mode active e-scan radar with synthetic aperture radar and Doppler beam sharpening. A laser radar (lidar) for terminal phase imaging and target recognition. The missile also feature a "semi-active laser guidance capability." MBDA believes that this guidance method will remain important for time-sensitive targeting for many years to come. Satellite datalink is to be incorporated for in-flight re-targeting, using thin-profile, low-observable active antenna arrays."
MBDA animations show Perseus to be vertically launched from surface warships as well as from the torpedo tubes of submerged attack submarines.
FC/ASW
At the 2016 UK–France Security Summit, the two parties pledged to work on a "joint concept phase for the FC/ASW programme to identify solutions for replacement of the Scalp/Storm Shadow missiles for both countries, Harpoon for the UK and Exocet for France." In the 2018 United Kingdom-France Summit, the FC/ASW programme was further affirmed.
In July 2021, then Secretary of State for Defence Jeremy Quin, responded to a question on the in-service date for FC/ASW, stating: "The planning assumption for service entry for Future Cruise /Anti-Ship Weapon on the Type 26 Frigate and Typhoon aircraft is 2028 and 2030 respectively".