Thanks for posting: it's a nice picture, and not from an angle I'm used to seeing the S-2 from.
The text is maybe a bit overstated: "first time" ignores a history of (non-U.S.) steam turbine locomotives going back, I think, to the 1920s.
The reference to battleships is understandable, but comparison shows the difference in scale between battleships and locomotives: the S-2 was basically a 6,000 hp locomotive, whereas the total installed turbine power (four turbines, one for each propellor) of an "Iowa" class battleship was 212,000 hp. ... Westinghouse was an established builder of marine turbines: two of the four Iowas had Westinghouse turbines (the other two had GE: do the names Westinghouse and GE call anything to mind in locomotive history?). So the S-2 was very much an effort to apply marine propulsive technology to a locomotive.