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A simulated Landing Helicopter Dock is being constructed on the flight line aboard Marine Corps Air Station Beaufort. An LHD is a classification for amphibious assault ships which are capable of landing helicopters or vertical take-off jets like the F-35B Lightning II. - A simulated Landing Helicopter Dock is being constructed on the flight line aboard Marine Corps Air Station Beaufort. An LHD is a classification for amphibious assault ships which are capable of landing helicopters or vertical take-off jets like the F-35B Lightning II.