German submarine U 153 under repair at the Kaiserliche Werft, Kiel, Germany in 1918

A list dealing dated 28 June 1918 reported the status of work on the submarines expected on 30 June. Work started on 10 June 1918. Planned completion unknown. Description of the work overhaul. Remarks scope of work unknown after in the dock bottom and pressure hull damage was noticed.

Source

Bundesarchiv RM 3-11254.