 Nimitz, after consultation with Admiral Ernest King, Commander in Chief of the United States Fleet, decided to contest the Japanese operation by sending all four of the Pacific Fleet's available aircraft carriers to the Coral Sea.By 27 April, further signals intelligence confirmed most of the details and targets of the "MO" and "RY" plans.On 29 April, Nimitz issued orders that sent his four carriers and their supporting warships towards the Coral Sea.