P-40 Warhawk fighters and single-handedly shot down four of them. The Japanese raiders began to arrive over Darwin at 9:58 am. HMAS Gunbar was the first ship to be attacked, being strafed by several Zero fighters. At about this time, the town's air raid sirens were belatedly sounded. The Japanese bombers then conducted dive bombing and level bombing attacks on the ships in Darwin Harbour. These attacks lasted for 30 minutes, and resulted in the sinking of three warships and six merchant vessels, and damage to another ten ships. The ships sunk were the USS Peary, HMAS Mavie, , (which exploded while docked at Darwin's main wharf), , , . The oil tanker Karalee and the coal storage hulk Kelat sank later. At least 21 labourers working on the wharf were killed when it was bombed. All but one of the P-40s of Major Floyd Pell's 33rd Pursuit Squadron, was shot down or destroyed on the ground at RAAF Darwin by the Japanese. Japanese aircraft bombed and strafed the base and civil airfield, as well as the town's army barracks and oil store. All of these facilities were seriously damaged. The bombers began to leave the Darwin area at about 10:10. On their way back to the carriers, their crews noted two Philippine-registered freighters lying just outside the port: Florence D. and Don Isidro. This information contributed to planning for the second raid that afternoon (which sank both vessels). Japanese losses may have been as few as five aircraft and three crew. Another 34 Japanese aircraft landed safely with battle damage. Warrant Officer Katsuyoshi Tsuru and First Petty Officer (1st class) Takezo Uchikado were killed when their Aichi dive bomber (bu. no. 3304; tail no. AII-254) crashed near RAAF Darwin. Petty Officer Hajime Toyoshima (a.k.a. Tadao Minami) was taken prisoner after crash-landing his damaged Zero (bu. no. b. n.5349; tail no. BII-124) on Melville Island. Those who ditched near the Japanese fleet and were rescued included Flyer 1st class Yoshio Egawa and the Aichi crew of Flyer 1st class Takeshi Yamada and Flyer 1st class Kinji Funazaki. In 2013, a reference was discovered in Japanese records to a Nakajima torpedo bomber suffering wheel damage from a "gunshot" and both crew (names unknown) being rescued after ditching (by the destroyer ). Allied ground fire was relatively intense and may have claimed all but two of the Japanese aircraft lost. Only one