RAF 156 Lancaster #PB209 Bomber command target for 12/13-Aug-1944, was converted to V1 rocket production during WW2.

PB209 took off at 22.01 on Saturday 12 August 1944, carrying red and green marker flares plus some incendiary bombs to light up the target for following aircraft as Pathfinder aircraft did not normally carry high explosive bombs.(2) The seven crew members included four Australians:
RAAF 407529 Flt Lt J N McDonald, DFM Captain (Pilot)
RAF Sgt E W Hunter (Flight Engineer)
RAAF 403914 Flt Lt S L Dennis DFC (Navigator)
RAAF 403983 FO L L Deed DFC (Air Bomber)
RAF WO W T Alsbury (Wireless Air Gunner)
RAAF 406522 FO D W Dunham (Mid Upper Gunner)
RAF Flt Sgt R H Valencia (Rear Gunner). RAF Warrant officer Bill Alsbury & 6 crew of Avro Lancaster bomber #PB209 completed their objective of flare marking the Opal factory target in Russelhiem, Germany around midnight 12/13 August 1944. The facility was converted to V1 rocket production during WW2. Lancaster PB209 was shot down on the return trip to RAF Upwood base over Wasserliesch, Germany at approx 00:41 by Heinz Wolfgang Schnaufer Germany's top fighter ace of WW2.