"The future of Navy ship-based helicopters presents some issues of concern and controversy for many in the U.S. Navy. The Navy operated SH-60B Seahawks from surface combatants in the antisubmarine warfare (ASW) role, SH-60F helicopters from carriers for ASW and the HH-690Hs from carriers for combat search and rescue and to support SEAL operations. The MH-60R combines both types of helicopter ASW as well as the surface surveillance and attack roles in the future, all of these helicopter roles are to be flown by the multipurpose MH-60R Seahawk and MH-60S Knighthawk helicopters."