Complex sentence: Another source reports that "Sarah Dixon" remained in towing service until either 1930 or 1933, when the engines were removed and the vessel was converted into a floating machine shop at the Shaver company docks.
Split into simpler sentences: Another source reports that "Sarah Dixon" remained in towing service until 1930 or 1933. At that time, the engines were removed and the vessel was converted into a floating machine shop at the Shaver company docks.