Naval Historywith Dr. Alex

Q&A · 4:43-5:37

CODOG propulsion and older diesel-steam arrangements

CODOG uses diesel engines or gas turbines, while older diesel-and-steam plants are a separate machinery arrangement.

Diesel EnginesGas TurbinesShip PropulsionWarship Design
Watch at this timeFull video guide
Question

What does CODOG mean, and is it the same as a diesel-steam system?

Short answer

CODOG is combined diesel or gas. Diesel-and-steam systems exist, but they are a different, older form of machinery arrangement.

Notes

CODOG means combined diesel or gas. A ship uses its diesel engines or its gas turbines rather than operating both sets simultaneously. Older warships did combine diesel and steam machinery, but that was a separate arrangement. The acronym therefore describes a choice between diesel and gas, not a general label for every mixed propulsion plant.