Primary sources disagree as to whether the aiming point was the marshalling yards near the centre of the city or the centre of the built-up urban area. The report by the 1st Bombardment Division's commander to his commander states that the targeting sequence was the centre of the built-up area in Dresden if the weather was clear. If clouds obscured Dresden but Chemnitz was clear, Chemnitz was the target. If both were obscured, they would bomb the centre of Dresden using H2X radar. The mix of bombs for the Dresden raid was about 40% incendiaries—much closer to the RAF city-busting mix than the USAAF usually used in precision bombardment. Taylor compares this 40% mix with the raid on Berlin on 3 February, where the ratio was 10% incendiaries. This was a common mix when the USAAF anticipated cloudy conditions over the target.