[3][2][1] The Type 424 was first announced in June 2021 when a contract was awarded to the NVL Group for the design phase.

[4] When concluding the contract with Naval Vessels Lürssen (NVL) in June 2021, the Federal cort of Audit, Bundesrechnungshof reported “significant concerns”.

It criticized the fact that the Ministry of Defense only wanted to discuss with the shipyard after the contract had been signed how exactly the ships should be built.

"Billions were awarded blindly and a very bad negotiating situation," wrote the Süddeutsche Zeitung.

[4][6] The Federal cort of Audit, Bundesrechnungshof intervened in 2023 and stated that there were significant risks arising from the contract structure with Lürssen.