Belaya Zemlya is separated from the main Franz Josef group by a broad strait known as "Proliv Severo Vostochnyy". Eva Island is the northernmost of the group. A few miles to the southwest lies small Adelaide Island (Остров Аделаиды), named in honor of Princess Adelheid of Hohenlohe-Langenburg. It is only in length. Freeden Island or Freden Island (Остров Фреден), is a larger oval-shaped island, with a length of . It lies south of Adelaide Island. This island was named after Wilhelm von Freeden, founder of the North German Naval Observatory ("Norddeutsche Seewarte").