Admiral Nagumo had kept half of his aircraft in reserve. These were two squadrons of dive bombers and torpedo bombers. At 07:15 Nagumo ordered his reserve planes to be re-armed with bombs for use against land targets. At 07:40 a scout plane from "Tone" saw a big American naval force to the east. It seems that Nagumo did not receive the report until 08:00. Nagumo reversed his order, but it took 40 minutes before "Tone"'s scout finally radioed that there was a carrier in the American force. This was one of the carriers from TF 16; the other carrier was not sighted.