What type of main lube oil supply and scavenging pump is installed on the marine gas turbine engine shown in the illustration? Illustration GT-0017

Correct Answer: Option C — Vane.

Vane-type pumps are standard in many aero-derivative gas turbines for lube oil supply and scavenging due to their high volumetric efficiency and compact design. These positive displacement pumps utilize sliding vanes to maintain consistent pressure and flow, ensuring reliable lubrication for high-speed bearings and gear assemblies.