The ships of this class were unique among ironclad warships in possessing on completion five masts, named fore-, second-, main-, fourth- and mizzen-.
ðə ʃˈɪps ʌv ðɪs klˈæs wɜː juːnˈiːk ɐmˌʌŋ ˈaɪɚŋklæd wˈɔːɹʃɪps ɪn pəzˈɛsɪŋ ˌɔn kəmplˈiːʃən fˈaɪv mˈæsts, nˈeɪmd fˈɔːɹ, sˈɛkənd, mˈeɪn, fˈoːɹθ ænd mˈɪzən.