Tirpitz brought a battleship’s threat to the routes between the Atlantic and the Soviet Union. A convoy exposed to heavy surface ships needed protection, warning or a way to avoid them. Keeping that danger in mind affected the employment of British warships even when Tirpitz remained in harbour.
But the German ship did not operate without restrictions. Orders for the March 1942 convoy operation directed her against shipping while warning against engagement with superior forces. Escort endurance and the conditions at sea limited what the formation could do. The surviving modern edition of the diary preserves both the offensive purpose and the cautions surrounding it. YT-T03
A battleship also needed protection
The March interception failed. In his subsequent report to Hitler, Raeder emphasised the danger from British carrier aircraft and the need for reconnaissance, escorts and air support. The proposed German carrier-supported force in that discussion was an aspiration, not a formation already available to accompany Tirpitz. YT-T04
This is a useful counterweight to the idea of an unstoppable battleship waiting in a fjord. Tirpitz could compel precautions while remaining vulnerable herself. Her commanders had to consider what might find her once she left shelter.
PQ17: the effect of an anticipated attack
In July, fear of a German surface attack formed part of the decision to disperse convoy PQ17. Roskill’s later official history traces the orders, their reception and the disastrous consequences for ships left exposed to submarines and aircraft. Tirpitz did not herself sink the dispersed convoy’s merchant ships. YT-T07
The distinction does not make the threat irrelevant. A danger can change a commander’s decisions without being realised in the form expected. It does, however, prevent assigning every subsequent loss directly to Tirpitz.
For this chapter, the PQ17 sequence rests on the official history, with the original Admiralty message sheets still to be examined. The evidence is stronger for the broad relationship between perceived surface danger and dispersal than for a new reconstruction of every signal and recipient.
Removing Tirpitz as a threat therefore meant more than waiting for a surface battle. British forces sought ways to reach her inside the defended anchorage.