No submarines or large transport planes were available for deployment at the end of last year, the report says.
It also points to failures in planning and leadership that have exacerbated existing problems in the military. The report was published by the parliamentary commissioner for the armed forces, Hans-Peter Bartels.
"The army's readiness to deploy has not improved in recent years, but instead has got even worse," Mr Bartels told reporters at a press conference in Berlin.
"At the end of the year six out of six submarines were not in use. At times, not one of the 14 Airbus A-400M could fly," he said.
The condition of the military's fleet of fighter planes, tanks, helicopters and ships is described as "dramatically bad". The report also says a lack of spare parts and outdated equipment has left "big gaps" in the armed forces
. https://www.bbc.com/news/world-europe-43134896