For many years engineers have speculated on the advent and possibilities of a useful gas turbine. A short article by W. E. Trumpler, entitled “The Combustion Turbine,” appeared in the February, 1935, issue of Power on pages 78 to 80. This article included a description of the actual apparatus together with operating efficiency and other data.In the present paper, the author makes a preliminary survey of the application of gas turbines in the marine field. He derives a skeleton structure which he predicts will be completed at an early date by filling in the essentials of practicable design and construction technique.