Sergeant William Edward Stobbs was killed with his crew. Greiner's last victory in the Ruhr campaign came on the 25 July 1943. This night Harris began Operation Gomorrha, a massed air attack on Hamburg. At 02:50 southwest of Den Helder, Greiner claimed a Halifax. This was most likely Lancaster I, ED878, PM-V, of No. 103 Squadron RAF. Warrant Officer F. F. O'Hanlon was killed with his crew when the bomber crashed west of the Frisian Islands. On the night of the 3/4 August 1943 Greiner claimed his ninth and tenth aerial victories northwest of Schiermonnikoog at 03:06 and 03:48 The first was claimed as a Lancaster, the second as a Wellington. On 24 August Bomber Command mounted an attack on Berlin for the first time using ground-mapping radar. Greiner shot down a Halifax at 01:43 northwest of Berlin. He recorded his 12th victory over a Lancaster near Bergfeine at 23:48 on 22 September. The following night he claimed a Lancaster south of Lampertheim at 23:30. On the night of the 27 September 1943 Greiner intercepted a Halifax over the North Sea. As Greiner approached he saw the bomber was heavily damaged and flying on only two engines just above the waves. Greiner was amazed at the skill of the crew for flying this far. Greiner considered the condition of the bomber and crew, then rocked his wings in salute and flew back to base. Staffelkapitän On 4 October 1943 Hermann Greiner was appointed Staffelkapitän of 10./NJG 1. At this time Greiner's Bf 110G-4 was fitted with Schräge Musik, upward firing armament. The arrangement allowed for German night fighters to approach the British bombers in their blind spot, from underneath. The British four-engine bombers lacked a ball turret and the German crew could take their time in aiming more carefully. The night fighter usually flew to the side of the bomber to avoid it being seen by the tail gunner and then slid underneath. The risk in the conventional tactic of approaching from behind and passing within view of the tail turret was eliminated. Greiner was to shoot down the majority of his remaining victims using the Schräge Musik. Greiner had to wait until Bomber Command flew against Braunschweig on 14/15 January 1944 to use the new armament system. This night the German fighters infiltrated the bomber stream as it crossed the frontier and commenced their attack on the bombers near