The air attack of 15 September caused severe bow damage. German assessments discussed the danger that the damaged structure could tear away during a passage and the extensive work needed for a proper repair. Estimates for the hull and machinery concerned different tasks; they should not be flattened into a single period of “nine months out of action.” YT-T11
By 23 September, the decision was to retain Tirpitz as a floating battery. Remaining in commission preserved a role for her guns and crew. It did not mean she was again available as an ocean-going battleship.
A passage under restrictions
After strengthening work, Tirpitz left on 15 October and reached her anchorage near Tromsø on 16 October. The diary reports the passage at eight knots under her own power, without tugs. This was a successful transfer in a damaged condition, not a demonstration of normal operational speed. YT-T15
Later October entries distinguish what could be attempted in calm conditions from what would require further structural work. Twelve knots without pitching and a higher speed conditional on added support were restricted capabilities. They did not restore the freedom to manoeuvre at sea that convoy interception would require.
An attack on 29 October brought further damage and renewed uncertainty over steering and mobility. The final anchorage offered a place from which to use the ship as a battery, but it also fixed her in a known position.
The final attack
On 12 November, RAF Lancasters from Nos. 9 and 617 Squadrons attacked with Tallboy bombs. Tirpitz capsized. The contemporary service account in V Group News describes the operation and its observations, but it is not a substitute for every squadron’s operations record or an exact reconstruction of all bomb impacts. YT-T06
The later American technical report attempted to explain the flooding and loss of stability. Some of its evidence came from a chief engineer who had not been present at the final sinking. It also distinguishes confirmed and probable hits. Its analysis is valuable, but its uncertainties must remain visible. YT-T02
The ship’s loss was also a disaster for the men aboard. A reconciled nominal roll and a complete rescue narrative remain outside the scope of this chapter. Those require records beyond a technical explanation of how the hull overturned.
The campaign had ended. Its significance, however, depended on the years of threat and repeated interruption that preceded that final morning.