USS Cushing (TB-1), showing her twin four-bladed propellers and rudder. Photo taken prior to the ship’s launching from Herreshoff Manufacturing Co., Bristol, RI. January 23, 1890. [900 x 1000]

USS Cushing (TB-1), showing her twin four-bladed propellers and rudder. Photo taken prior to the ship’s launching from Herreshoff Manufacturing Co., Bristol, RI. January 23, 1890. [900 x 1000]

A close-up view of the stern and propellers of the guided missile destroyer CURTIS WILBUR (DDG-54) on the ways prior to the vessel’s christening and launching ceremony [1600 × 1269]

A close-up view of the stern and propellers of the guided missile destroyer CURTIS WILBUR (DDG-54) on the ways prior to the vessel’s christening and launching ceremony [1600 × 1269]

[4610 × 3073] The Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56) sits in Dry Dock 6 in Yokosuka Japan. Water is pumped into the propellers to test its Prairie-Masker system

[4610 × 3073] The Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56) sits in Dry Dock 6 in Yokosuka Japan. Water is pumped into the propellers to test its Prairie-Masker system