Admiral Lütjens gave permission for "Prinz Eugen" to engage "Suffolk", though the captain of the German cruiser could not clearly make out his target and so held fire. "Suffolk" quickly retreated to a safe distance and shadowed the German ships. At 20:30, the heavy cruiser joined "Suffolk", but approached the German raiders too closely. Lütjens ordered his ships to engage the British cruiser; "Bismarck" fired five salvoes, three of which straddled "Norfolk" and rained shell splinters on her decks. The cruiser laid a smoke screen and fled into a fog bank, ending the brief engagement. The concussion from the 38 cm guns disabled "Bismarck"s FuMo 23 radar set; this prompted Lütjens to order "Prinz Eugen" to take station ahead so she could use her functioning radar to scout for the formation. The British cruisers tracked "Prinz Eugen" and "Bismarck" through the night, continually relaying the location and bearing of the German ships.