Work on Tirpitz was completed later than anticipated, and she was not commissioned until 25 February; the ship was not ready for combat until late in the year. To further complicate the situation, Gneisenau was torpedoed in Brest and damaged further by bombs when in drydock. Scharnhorst required a boiler overhaul following Operation Berlin; the workers discovered during the overhaul that the boilers were in worse condition than expected.