After the decision was made to launch the attack, the bombers were to fly individually across the Norwegian Sea, and cross the Norwegian coast at a point between Mosjøen and Namos where No. 100 Group RAF had found a gap in German radar coverage. The Lancasters were to rendezvous over Torneträsk lake in northern Sweden; this flight path involved violating Sweden's neutrality, but was selected as it would allow the bombers to approach Tromsø from the south-east, which it was believed the Germans would not expect. After the rendezvous was completed and if weather conditions remained suitable, the bombers would proceed to Tromsø and attack "Tirpitz" if she could be visually spotted or, if obscured, her location confirmed relative to unobstructed landmarks. If these criteria were not met, the aircrew were not to bomb. Following the attack on "Tirpitz", the bombers were to fly directly back to Scotland.