were quicker to position and easier to move around. Third, the preservation of his force was critical. The fewer fighters he had in the air (he advocated 16 at most), the smaller target the numerically superior enemy would have. Over Malta, he reversed these tactics owing to changed circumstances. With plenty of Spitfires to operate, Park sought to intercept the enemy and break up his formations before the bombers reached the island. Until this point, the Spitfires had fought defensively. They scrambled and headed south to gain height, then turned around to engage the enemy over the island. Now, with improved radar and quicker take off times (two to three minutes) and improved air-sea rescue, more offensive action became possible. Using three squadrons, Park asked the first to engage the escorting fighters by 'bouncing them' out of the sun. The second would strike at the close escort, or, if unescorted, the bombers themselves. The third was to attack the bombers head-on. The impact of Park's methods was instant. His Forward Interception Plan, issued officially on 25 July 1942, forced the Axis to abandon daylight raids within six days. The Ju 87s were withdrawn from operations over Malta altogether. Kesselring responded by sending in fighter sweeps at even higher altitudes to gain the tactical advantage. Park retaliated by ordering his fighters to climb no higher than . While this did give away a considerable height advantage, it forced the Bf 109s to descend to altitudes more suitable for the Spitfire than the German fighter. The methods would have great effect in October when Kesselring returned. Allied victory (October–November 1942) British offensive operations While the RAF and Royal Navy defensive operations dominated for the most part, offensive strikes were still being carried out. The year 1942 was particularly impressive for offensive operations as well. Two-thirds of the Italian merchant fleet was sunk; 25% by British submarines, 37% by Allied aircraft. Axis forces in North Africa were denied around half of their supplies and two-thirds of their oil. The submarines of Simpson's 10th Flotilla were on patrol constantly, except for the period May–July 1942, when Kesselring made a considerable effort against their bases. Their success was not easy to achieve, given most of them were the slow U-class types. Supported by S- and T-class vessels, they dropped mines. British submarine commanders became aces while operating from Malta. Commanders Ian McGeoch (commanding ), Hugh