The firm had offered its Type 212CD submarine which is being built for both Germany and Norway, beating a competing bid from South Korea's Hanwha Ocean.
Germany is among a number of countries that have offered help in securing the shipping lane, but only if an Iran ceasefire deal turns out to be lasting.
Berlin is awaiting a final call by the Trump administration to honor a Biden-era agreement under which U.S. missiles are to bolster Germany’s deterrence.
Germany wants to buy 600 of the most capable variant of the PAC-3 missile as it works to provide Ukraine with the weapons while replenishing its own stock.