 At about the same time, four Grumman F4F Wildcat fighters from "Yorktown" intercepted a Kawanishi H6K reconnaissance flying boat from the Yokohama Air Group of the 25th Air Flotilla based at the Shortland Islands and shot it down from TF 11.The aircraft failed to send a report before it crashed, but when it didn't return to base the Japanese correctly assumed that it had been shot down by carrier aircraft.A message from Pearl Harbor notified Fletcher that radio intelligence deduced the Japanese planned to land their troops at Port Moresby on 10 May and their fleet carriers would likely be operating close to the invasion convoy.