III. The ships are armed with a single Oerlikon 20 mm cannon (then replaced by Browning M2 12.7 mm). Gaeta class Depending on the source, the Gaeta-class ships are considered to be either a Lerici subclass, or a separate class of ships. The eight ships of the Second Series Lerici class, more commonly known as the Gaeta class, were all launched in the early 1990s, and were commissioned by May 1996. The Gaeta class is almost identical to the Lerici class: the main structural differences between the ships are that displacement of the latter is 77 tons greater, the hull is longer, and the communications mast was moved from above the bridge to just forward of the exhaust funnel. The Gaetas also used an improved version of the VDS FIAR SQQ-14 (IT) sonar, which was fitted in 1991 to the four Lerici-class ships. ROV are Gaymarine Pluto and Gaymarine Pluto GIGAS.Navigation radar GEM Elettronica SPN-753 replaced with (V)9 ARPA version (I band).CMS was evolved version (Combat Management System) Datamat SSN-714(V)3UL. On board one larger hyperbaric chamber (8 seats). Gaeta MLU In 2010 Intermarine began MLU (mid-life update), expected to complete in 2018. New sonar is Thales 2093 Mk2, new CMS (Combat Management System) Selex ES SSN-714(V)4, new containerized and removable hyperbaric chamber and added new EMDV (Expendable Mine Disposal Vehicle) Gaymarine Plutino (MIKI, MIne KIller). Derivatives The Lerici class design has been successfully exported to Algeria, Australia, Finland, Malaysia, Nigeria, the United States, Thailand and Taiwan. However, an inflexible export policy and demands by Intermarine that all ships be built in Italy are believed to have prevented wider sales. These restrictions were lessened in the leadup to the deals with the United States and Australia. Mahamiru class The Royal Malaysian Navy operates four ships based on the Lerici class design: KDs Mahamiru (11), Jerai (12), Ledang (13), and Kinabalu (14). The four ships were ordered from Intermarine on 20 February 1981, commissioned into the Royal Malaysian Navy on 11 December 1985, and arrived in Malaysia on 26 March 1986. Referred to as "Malaysian Lericis" or as Mahamiru-class ships, two each are based in Lumut and Labuan. Mahamiru-class ships vary in design from the Lerici class. Most significant of these is that Mahamirus are equipped with two diesel engines with dedicated propeller shafts instead of a single engine and propeller, giving them a maximum speed of and a minehunting speed of