Cheshire's low level technique came together in his mind following his failure at the Anthéor viaduct. He established that for the force to be effective they had to wait upon good weather. There would need to be good night time visibility at the target. Coming over the target area, a marker aircraft would drop a hooded parachute flare at 5,000 feet, illuminating the target area. Next, a low level target marking aircraft would come in at 4,000 feet, identify the target building and make a 30-degree dive attack on it, releasing the marker flare at 100 feet directly upon the roof of the target. Though he had been doing this with the Lancaster, the heavy bomber was really not well suited to the job. Cheshire believed the low marker aircraft should be fast and more manoeuvrable. The Mosquito seemed an ideal choice. With the target marked, the main bombing force of Lancasters would come in, one by one, dropping their bombs on the marker. This meant communication between the leader and his bombing aircraft. This sort of ongoing radio communication over enemy territory was a big break from the Bomber Command method, which operated over the continent in strict radio silence. Cheshire noted that things change in the course of military operations, and the attacking force had to be able to adapt to the conditions faced.