![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/COGAG-diagram.png/640px-COGAG-diagram.png&w=640&q=50)
Combined gas and gas
Two-turbine, one-shaft marine propulsion / From Wikipedia, the free encyclopedia
Combined gas turbine and gas turbine (COGAG) is a type of propulsion system for ships using two gas turbines connected to a single propeller shaft. A gearbox and clutches allow either of the turbines to drive the shaft or both of them combined. Marine usage of COGAG systems are similar to those found ashore.[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/5/57/COGAG-diagram.png/320px-COGAG-diagram.png)