▁lost ▁in ▁a ▁cy clone ▁in ▁the ▁G ulf ▁of ▁A den . ▁Victoria , ▁mean while , ▁was ▁removed ▁from ▁service ▁in ▁ 1 8 8 2 ▁and ▁served ▁inter mitt ently ▁as ▁a ▁fish ery ▁protection ▁vessel ▁between ▁ 1 8 8 4 ▁and ▁ 1 8 9 0 ▁before ▁being ▁broken ▁up ▁in ▁ 1 8 9 2 . ▁ ▁Ari ad ne ▁class ▁ ▁By ▁ 1 8 6 7 , ▁the ▁Pr uss ian ▁Navy ▁had ▁been ▁re organ ized ▁as ▁the ▁North ▁German ▁Federal ▁Navy , ▁Pr uss ia ▁having ▁formed ▁the ▁North ▁German ▁Confeder ation ▁in ▁the ▁w ake ▁of ▁the ▁Aust ro - Pr uss ian ▁War . ▁The ▁n avy , ▁under ▁the ▁direction ▁of ▁Kon ter ad mir al ▁( R ear ▁Admir al ) ▁Edu ard ▁von ▁J ach mann , ▁form ulated ▁a ▁new ▁construction ▁plan ▁that ▁year ▁that ▁laid ▁out ▁its ▁prior ities ▁for ▁ship ▁building ▁over ▁the ▁next ▁several ▁years . ▁The ▁plan ▁called ▁for ▁a ▁total ▁of ▁twenty ▁sc rew ▁cor v ettes , ▁of ▁which ▁four ▁had ▁already ▁been ▁acquired — the ▁N ym phe ▁and ▁August a ▁classes . ▁By ▁the ▁late ▁ 1 8 6 0 s , ▁German ▁over se as ▁economic ▁interests ▁became ▁more ▁important ▁as ▁the ▁German ▁lands ▁export ed ▁increasing ▁amounts ▁of ▁manufact ured ▁goods ; ▁the ▁cor v ettes ▁of ▁the ▁ 1 8 6 7 ▁fleet ▁plan ▁would ▁be ▁the ▁back bone ▁of ▁the ▁naval ▁force ▁that ▁protected ▁these