kɹˈʌp ˈɑːɹmɚ wʌz swˈɪftli ɐdˈɑːptᵻd baɪ ðə wˈɜːldz mˈeɪdʒɚ nˈeɪviz; bɐlˈɪstɪk tˈɛsts ʃˈoʊd ðæt tˈɛn.tˈuː ˈɪntʃᵻz twˈɛnti fˈaɪv.nˈaɪn sˌiːˈɛm ʌv kɹˈʌp ˈɑːɹmɚɹ ˈɔfɚd ðə sˈeɪm pɹətˈɛkʃən æz twˈɛlv ˈɪntʃᵻz θˈɜːɾi.fˈoːɹ sˌiːˈɛm ʌv hˈɑːɹvi ˈɑːɹmɚ.
Krupp armour was swiftly adopted by the world's major navies; ballistic tests showed that 10.2 inches (25.9 cm) of Krupp armour offered the same protection as 12 inches (30.4 cm) of Harvey armour.