Here's a shot of the engine room of SC 301. The auxiliary engine is on the right. That was used to generate electricity for the boat, and compressed air to start the main engines. You can see the center engine on the left, and the reverse control lever of the port engine to the far right.
SC 301 is one of a dozen chasers that served along the Pacific coast and farther to the south. After almost making it to duties overseas, but turning back after the Armistice was signed, SC 301 visited St. Thomas, Santo Domingo, Guantanamo, Balboa, Corinto, Acapulco, and La Paz.
For those interested in regional WWI works, I recently picked up a copy of Richard Wasserman's new book, The War to End All Wars: New Jersey's Role in World War I.
There's a section on submarine chasers, as of course NJ played a big role, with Elco producing ML boats and 110-ft. chasers in Bayonne. Mathis Yacht in Camden built chasers as well, notable among them the ill-fated SC 209, which was mistaken for a submarine and fired on and sunk by friendly fire.
It's a small section of a much larger topic Wasserman covers. Heavily illustrated, with lots of accounts of men and women of New Jersey and their roles in the war.
I bought it here, but it looks like now it's available on Amazon and various other sellers.
--Todd Woofenden, editor