Related time notes
- German Merchant Seaplane Tenders of the 1930s: Key Ships Series 8 - Ship 86:54A floating support system for transatlantic airmailChapter
- German Merchant Seaplane Tenders of the 1930s: Key Ships Series 8 - Ship 811:31Westfalen from airmail tender to wartime prison shipChapter
- German Merchant Seaplane Tenders of the 1930s: Key Ships Series 8 - Ship 817:24Schwabenland's airmail, Antarctic, and wartime careersChapter