No mayday message was sent by the US Air Force helicopter which crashed inNorfolk killing all four on board.
Colonel Kyle Robinson, commander of the 48th Fighter Wing based at RAF Lakenheath, Suffolk said there was no emergency message as he paid tribute to the dead servicemen.
Asked if emergency warnings were made in the moments before the HH-60G PaveHawk went down, Col Robinson said: "Not that I'm aware."
RAF Marham's station commander has spoken about the base's role in the investigation into last week's helicopter crash in north Norfolk.
Churches in our region have been lighting candles in memory of the American air crew killed when their helicopter crashed in Norfolk.
Last year the US Airforce published a story on the importance of helicopter training missions.