Prairie-Masker is a radiated noise reduction system fitted to some western warships, including the Oliver Hazard Perry-class frigates, Spruance and Arleigh Burke-class destroyers, and the Ticonderoga-class cruisers of the US Navy. The system was also installed during the 1960s on a limited number of post WWII Guppy III modified, and later diesel submarines.
A propeller based Prairie system being tested in drydock.
Arleigh Burke-class destroyer
The Arleigh Burke class of guided-missile destroyers (DDGs) is a United States Navy class of destroyer centered around the Aegis Combat System and the SPY-1D multi-function passive electronically scanned array radar. The class is named for Admiral Arleigh Burke, an American destroyer officer in World War II and later Chief of Naval Operations. With an overall length of 505 to 509.5 feet, displacement ranging from 8,300 to 9,700 tons, and weaponry including over 90 missiles, the Arleigh Burke-class destroyers are larger and more heavily armed than many previous classes of guided-missile cruisers.
USS Jack H. Lucas during acceptance trials
Flight I ship USS Fitzgerald with Tactical Towed Array Sonar (TACTAS) in the center of the fantail, Harpoon missile launchers, distinctive stacks, and no helicopter hangars
Flight IIA ship USS Mustin without TACTAS and no Harpoon launchers, but with helicopter hangars and new exhaust stacks design
Flight III ship USS Jack H. Lucas showing the larger AN/SPY-6 arrays, stacked rigid-hull inflatable boats, and slight exhaust stack modifications