Etna-class replenishment oiler

Etna (A 5326), Napoli 2010
Class overview
Name	Etna
Builders	Italcantieri - Cantieri Navali del Tirreno e Riuniti, Riva Trigoso, Elefsis Shipyards
Operators	Italian Navy  Hellenic Navy
In commission	1998-2003
Completed	2
Active	2
General characteristics
Type	replenishment oiler
Displacement	- 13.400 t (13.188 long tons) full load - 5.980 t (5.886 long tons) to empty ship
Length	- 146.6 m (481 ft) LOA - 138.8 m (455 ft) LPP
Beam	21 m (69 ft)
Draft	7.25 m (23.8 ft)
Depth	7.4 m (24 ft)
Propulsion	- 2 × shafts with controllable pitch propellers - 2 x diesel engines Sulzer 12V-ZAV-40S, 8,640 kW (11,590 bhp) each - 1 x bow thruster
Speed	21 knots (39 km/h; 24 mph)
Range	7,600 nmi (14,100 km; 8,700 mi) at 18 knots (33 km/h; 21 mph)
Complement	up to 245
Crew	160
Sensors and processing systems	Etna: - 1 x surface radar Selex ES RASS X band radar - 2 x navigation radar GEM Elettronica LD-1825 (I band) (MM/SPN-753 and MM/SPN-754) - 1 x SICRAL 1, 1B and 2 satellite communication system other satellite communication systems Prometheus: - 1 x Raytheon surface radar AN/SPS-10D (G band)[1] - 2 x navigation radar GEM Elettronica LD-1825 (I band)
Electronic warfare & decoys	Prometheus: - AN/SLQ-25 Nixie decoy
Armament	Etna: - 2 x OTO Melara - Oerlikon KBA 25/80 mm - Machine Guns: 2 x Browning M2HB 12.7 mm Prometheus: - 1 x CIWS Vulcan Phalanx Mk 15 Mod.12 20 mm (+1 to be fitted) - 4 x Rheinmetall 20 mm - Machine Guns: 2 x Browning M2HB 12.7 mm; 6 x 0.30 in (7.6 mm ), 2 x MG-3 7.62 mm
Aviation facilities	- flight deck 28 m (92 ft) x 21 m (69 ft), for SH-90 and AW-101 or ΑΒ-212 ASW and Sikorsky S-70B6 SeaHawk - hangar for 1 x AW-101 helicopter
Notes	- 4 x RAS (Replenishment At Sea) Hepburn systems - 1 x RAS aft station for the supply of oil

The Etna class^[2] is a ship class of two naval replenishment and logistic support ships used by the Italian Navy^[3] and by the Greek Navy^[4] The two ships are almost identical but they have differences in their armament and sensor equipment.

Fincantieri shipyards were awarded the contract for Etna in July 1995, and the ship was launched in July 1997. The ship was commissioned into the Italian Navy in February 1998.

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 it 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 can play a crucial role in civil protection operations when asked. 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 construction of the Greek ship HS Prometheus^[5] began in Elefsina on February 18, 2000, at the Elefsis Shipyards. It was launched on February 19, 2002, and commissioned into the Greek Navy on July 8, 2003. It is the largest ship of the Hellenic Navy (in terms of displacement). The Greek Navy does not have an aircraft carrier like the Italian Navy so the primary role of the ship is different. As the largest ship of the fleet it is used as a Command ship.

Transport Capacity:

• 5.795 t (5.703 long tons) NATO F76 diesel fuel
• 1.585 t (1.560 long tons) NATO F44/JP5 aviation fuel
• 30 t (30 long tons) Lubrication oil
• 160 t (160 long tons) fresh water

Other facilities:

• 30,000 rations of food supplies
• up to 12 ISO1C containers, 28 t (28 long tons) each
• 20 t (20 long tons) spare parts
• NATO Role 2+ Hospital facilities
• NBC protection
• 1 workshop for helicopter operations aboard helicopter
• 1 machine shop for repairs on the hull and equipment on engines
• 1 electro-mechanical workshop

Cargo transfer system:

• 1 frame with 2 lateral liquid transfer stations
• 1 fuel transfer station astern.

Ship	Navy	Namesake	Builder	Commissioned	Status
Etna (A 5326)	Italian Navy	Etna	Fincantieri	July 29, 1998	In Service
HS Prometheus Προμηθέας	Hellenic Navy	Prometheus	Elefsis Shipyards	July 8, 2003	In Service

• 
  A 5326 Etna (2011)
• 
  HS A-374 Prometheus at Faliron bay (2008)
• 
  HS Prometheus A374 in the port of Málaga (2005)
• 
  A 5326 Etna at the port of Cartagena, Spain (2011)

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