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The Indonesian sub that sank was apparently made in Germany
filled with Israeli tech.Now German subs are fitted with Russian
navigation tech.
https://www.dw.com/en/german-submarines-fitted-with-russian-technology-report/a-57030819

A navigation system of Russian origin called Navi-Sailor 4100
has been installed on at least 100 vessels operated by Germany’s
military, the Bundestag, including submarines, since 2005, according
to Bild am Sonntag. The navigation devices were developed by
Transas, a company founded in St. Petersburg in 1990. Although it
was purchased in 2018 by the Finnish firm Wartsila, the defense
division remained in Russian hands.