and making 24 knots. The cruisers reported the shadower, but had no means to drive it off. Nagumo increased speed from 24 to 28 knots upon receiving the sighting. Carrier Division 5's reserve strike force was ordered rearmed with anti-ship torpedoes, replacing the high explosive bombs intended for a second strike on Colombo. The rearming encountered delays, and the strike was carried out by Carrier Division 2 instead; Soryu and Hiryu began launching dive bombers at 11:45. Force A radar detected the air strike on Dorsetshire's force at 13:44, putting the aircraft to the northeast. Cornwall and Dorsetshire were sunk at 1400; ultimately 424 officers and crew were lost. The Japanese missed an opportunity to find Force A after sinking the cruisers. The aircraft shadowing the cruisers flew another along the cruisers' course before returning to Tone. It would have detected Force A if it had flown southwest another ten minutes. Nagumo recovered the strike against the cruisers at 14:45. Nagumo evades Somerville Somerville launched four Albacores from Indomitable at 14:00 to search an arc to the northeast out to . Nagumo's southeasterly course would have taken the Japanese fleet right through the centre of the arc. However, at 15:00 or 15:30, Nagumo changed course to the southwest. Carrier Division 2 did not immediately follow; it performed a series of kinking manoeuvres starting at 15:00 that initially took it northwest. Carrier Division 2 was spotted by the two northerly Albacores around 16:00. Hiryū launched Mitsubishi A6M Zero fighters to intercept the scouts; one Albacore was damaged at 16:04, and the other shot down at 16:28 without reporting. The two southernmost Albacores missed Nagumo's main body. Somerville did not receive the damaged Albacore's sighting report until 16:55; the report gave the position of Carrier Division 2 with reasonable accuracy, placed the Japanese away, but contained no other data. At 17:00 he received signals intelligence (SIGINT) from Colombo reporting the Japanese course at 14:00 as southwesterly at 24 knots. Somerville ordered a course change to the southwest at 17:26, not knowing that Nagumo's main body was away, and that Carrier Division 2 was only away. The course change was presumably to maintain distance between a superior enemy that was believed to be still closing, or to cover Port T from attack, but it also meant the British lost an opportunity to meet the enemy; had Force A continued on its easterly course,