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|Preceded by:||Lupo class|
|Succeeded by:||Bergamini class|
|Length:||122.7 m (403 ft)|
|Beam:||12.9 m (42 ft)|
|Draught:||4.2 m (14 ft)|
|Propulsion:||2 × GE/Avio General Electric LM2500 gas turbines
2 × Grandi Motori Trieste BL-230-20-DVM diesels
|Speed:||33 kn (61 km/h; 38 mph) (21 kn (39 km/h; 24 mph) on diesel)|
|Range:||6,000 nmi (11,000 km; 6,900 mi) at 15 kn (28 km/h; 17 mph)|
|Armament:||4 × TESEO Mk-2 anti-ship missiles, double launchers
|Aircraft carried:||2 AB-212 helicopters|
The Maestrale class is a class of frigate in the Marina Militare (Italian Navy). The class is composed of eight vessels, all of which were built by Fincantieri S.p. A, Riva Trigoso, except for Grecale, which was built by Fincantieri S.p.A. - Muggiano, La Spezia.
The Maestrale-class frigates were primarily designed for anti-submarine warfare, however the ships are highly flexible so they are also capable of anti-air and anti-surface operations. Ships of this class have been widely used in various international missions, either under NATO or UN flag, and during normal operations of the Italian Navy.
These ships were built with the experience and the technology already developed for the previous Lupo class. The Maestrales were quite bigger and heavier, so they were slower, but still capable of around 32 knots. The ships have a large superstructure, with one large turret and only one funnel. There are two enclosed pyramid masts, one of which is quite low, the other much taller. The superstructure continues without interruption until the hangar, and is made, as usual, with light alloys.[specify]
The propulsion system is based on two gas-turbine GE-Avio LM-2500 and two diesel engines, in a Combined diesel and gas configuration, that make use of diesel for cruising and turbines for high speed. The only problem with this configuration, which is highly economical, is to make the diesel engines powerful enough to achieve sufficient cruising speed without overloading them, or assist them with a continuous use (at low, uneconomical power) of the turbines. In this case, the solution, already developed for the Lupo-class ships, was successful. The ships have a maximum range of 6,000 nautical miles (11,000 km) at 15 knots (28 km/h).
The Maestrale class ships are armed with an array of systems. Mounted on the foredeck is an Oto Melara 127/54 mm gun, capable of shooting 40 rounds per minute. Despite its large size, it was possible to fit it in the relatively small hull, since the Lupo-class ships were fitted with the same weapon. It has 66 shells on three ready-fire carousels. It also had low reaction times and high elevation, with a 32 kilograms (71 lb) shells and 23 kilometres (14 mi) range.
The ships also carry the Albatross missile system, with an octuple cell capable of firing Sea Sparrow or Aspide missiles. This modern weapon contains a monopulse guide and a powerful rocket-engine, and advanced flight controls. The ships carry a supply of 24 missiles, and the system is reloaded by a Riva-Calzoni Automatic Handling System, which is capable of loading up to four missiles at once, making virtually all the missiles in the magazine ready to be launched.
After the turret there are two CIWS DARDO, with 2 x 40/70 mm L70 Bofors guns. They have very rapid mechanical systems, and depots with over 700 shells, and can fire around 600 rounds per minute. The proximity fuses and the fire control systems help this unmanned turret to react quickly to incoming missiles.
Also on deck are four Otomat anti-ship missiles, capable of striking a target 160 km (99 mi) or more away, with a 210 kg (460 lb) warhead. They are fitted over the hangar, where there are two AB-212 helicopters anti-submarine warfare ASW multi-role machines.
Finally, there are four torpedo-launchers, two triple ILAS-3 (similar to Mk 32) with 324 mm caliber, with 12 torpedoes available (not known if they are shared also with helicopters), and the most particular weapon, the A.184, a wired torpedo with two launch tubes and six to eight torpedoes. This is the main weapon for ASW tasks, but it also be used as an anti-ship weapon, even though its propulsion system (electric) does not allow great speed and range. Compared to ASROC, this weapon has many advantages, and does not require a bulky launcher, but needs several minutes, even at 35 knots (65 km/h), to reach nine kilometers, while ASROC can do this in much less time.
Electronic warfare outfit
These ships have also have several electronic systems: one radar air and surface search RAN10S (160 km (99 mi)) is placed over the smaller tree, a radar of navigation and surface search SPN703 is fitted on the main tree, where a navigation radar is present as well, and finally, three radars: one RTN-10X for gun and Aspide control, and two smaller RTN-20X for the DARDO systems, all fitted in the forward superstructure, separated from the aft by the funnel and the heat dissipaters. As two submarine search, there is a VDS DE 1164 sonar, and DE1160B hull mounted. EW component is focused on Elettronica Spa MM/SLQ-746 (  ) and two SCLAR rocket-launchers that are capable of launching chaff, flare, and HE rockets up to 10 km (6.2 mi).
Several electronic and communication systems are fitted as well, and an Selex ES IPN20 command and control system is present to integrate all the tactical information and use the weapons on board. 
Comparison of Maestrale and Lupo classes
The Lupo class entered in service in 1977. The Maestrale class is an upgraded version of its predecessor. Maestrale shares the same, extremely slim hull (with a length/width of 10:1) but this was enlarged to accommodate many more systems. The Lupos are 3 kn (5.6 km/h; 3.5 mph) faster, and is equipped with eight OTOMAT. The Maestrales have much of Lupo 's equipment, but arranged differently. Endurance was increased with the Maestrale class from 5,000 to 6,000 miles (8,000 to 9,700 km).
The Maestrales have half the OTOMATs of the Lupo class but twice as many torpedo launchers (with the introduction of the new heavy torpedoes), twice the helicopters, and twice the sonars, having also a VDS. This, coupled with heavy torpedoes and two helicopters, improved dramatically the ASW capabilities. The use of more modern equipment and an Albatross missile system improved in some aspects the air defense.
The Maestrale class has some shortcomings. The most prominent is the air-defense layout: while the Lupo class has the four weapons distributed across the entire hull length, Maestrales, because of the double hangar, lacked this ability, resulting in all of the weapons systems being placed on the foredeck and midships. This arrangement leaves dangerous blind spots in the ships' defenses.
After their entry in service, Maestrales were modernized with some minor programs. The equipment present on the Maestrale-class ships is almost equal to what it was in 1982, except for a pair of 20 mm guns installed as 'anti-fast vessels close defense', in 2005.
Transfer to the Philippines
A delegation from the Philippines' Department of National Defense (DND) inspected ships of both the Maestrale and Soldati-classes of frigates during their visit to Italy on February 2012 as possible candidates for the Deep Water Patrol Vessel project of the Philippine Navy. No indication of sales was made.
A press conference by the DND on 2 August 2012 included the announcement of ongoing negotiations with the Italian government to purchase two Maestrale frigates for PhP 11.7 billion and are expected to be delivered within 2013 after refurbishing. On 22 September the Philippines' Congress approved a budget that includes funding for the two frigates. The negotiations for the Maestrale-class ships were concluded without agreement to sell and transfers the ships, with the Philippine government opting to buy new frigates instead.
On 4 July 2013, it was announced that the Philippines would acquire two Maestrale-class frigates. The cost of the acquisition would be $400 million for two new frigates, with the Philippines rejecting the Italian Navy's offer of refurbished frigates.
|Wikimedia Commons has media related to Maestrale class frigates.|
|F570||Maestrale||CNR Riva Trigoso||2 February 1981||7 March 1982||Active in service|
|F571||Grecale||CNR Muggiano||12 September 1981||5 February 1983||Active in service|
|F572||Libeccio||CNR Riva Trigoso||7 September 1981||5 February 1983||Active in service|
|F573||Scirocco||17 April 1982||20 September 1983||Active in service|
|F574||Aliseo||29 October 1982||20 September 1983||Active in service|
|F575||Euro||25 March 1983||7 April 1984||Active in service|
|F576||Espero||19 November 1983||4 May 1985||Active in service|
|F577||Zeffiro||19 May 1984||4 May 1985||Active in service|
- "Maestrale class Anti-submarine Frigates (ASW)". navyrecognition.com. 7 August 2012. Retrieved 17 February 2015.
- "Gazmin signs agreement with Italian Defense Minister". DND Office of Public Affairs. 6 February 2012. Retrieved 17 February 2015.
- Kwok, Abigail (2 August 2012). "Philippines mulling purchase of Italian frigates". Interaksyon.com. Retrieved 17 February 2015.
- [dead link]
- "No more second frigates for PN - DND official". Philippine News Agency. 2013-02-22. Retrieved 2013-02-22.[dead link]
- "Manila to pay $400 million for two Italian frigates". Defense Update. 4 July 2013. Retrieved 17 February 2015.
- "PH to buy two Maestrale frigates from Italy". Inquirer.net. Agence France-Presse. 3 July 2013. Retrieved 17 February 2015.
- Enciclopedy Armi da guerra, De Agostini, 1984, pp. 1414-1415
- Po, Enrico I radar navali di Alenia, RID 12/1997