Designated a "command and logistics ship" by the Italian Navy, the vessel is powered by two Sulzer 12V-ZAV-405 diesel engines turning two shafts creating 17,290 kilowatts (23,190 hp).

[4] The ship has four replenishment at sea (RAS) systems, two of which are capable of transferring solid stores and one aft, which can only be used for refueling.

[4] The second ship of the class, the Greek HS Prometheus, has similar characteristics to Etna, but significant differences in armament.

[4][5] Etna's main role is to fully support the long-range missions of a naval squadron, which would typically include an aircraft carrier and complete escort.

Additionally, Etna has to be in position to refuel the squadron, including the air wing of the carrier, and also provide full logistic support in terms of repair workshops, spare parts, ammunition replenishment and supplies.

The ship has high autonomous capacity to provide electrical power, fresh water and prepared meals and also has fully equipped hospital and medical facilities on board.

The vessel served as part of Italy's commitment to Operation Enduring Freedom in the Arabian Sea and Persian Gulf in 1999/2000 and again in 2006.