(Work in Progress, to be continued)
Since before the Second World War, Italy has been a prolific designer and producer of small submarines. The CA and CB-class midget submarines and their operational histories are already well-known, but those produced post-WWII are much less known, poorly documented and the subjects of confusion and misinformation. Fincantieri, Maritalia and Cos.Mo.S. are all known to have produced viable small submarine designs, however only Cos.Mo.S. is known to have definitely produced actual small submarines, albeit all for export.
This file is intended to serve as a repository for actual and projected post-World War 2 Italian small submarines designs. As always, comments and additional information are welcomed.
Cos.Mo.S. SpA, Livorno
Overview
Over the course of its 48-year history from 1955 to 2003, Cos.Mo.S. is believed to have produced a total of 24 midget submarines. Of these, 20 were delivered to five export customers, three were sold to Iraq but never delivered, and one remained at the Cos.Mo.S. factory as a demonstrator and developmental testbed. For further information on Cos.Mos.S. history, see separate entry under Italian Chariots.
Because of Cos.Mo.S' very secretive business practices, it may never be possible to completely ascertain all their boats' deliveries, but the most likely breakdown of their actual midget submarine deliveries is as follows (Provisional):
Type Date Quantity Customer
SX-404 1969 2 Taiwan
SX-404/B 1972 6 Pakistan
SX-506 1973 2 Colombia
SX-506 198? 2 Republic of Korea (i.e. South)
SX-756/K 198? 5 Republic of Korea
SX-756/W 1985 3 Pakistan
SX-756/W 1989 2 Iraq (never delivered)
SX-756/S 1989 1 Iraq (never delivered)
MG-120/ER unknown 1 Demo boat retained at factory
Cos.Mo.S' midget submarine designs were an ongoing evolution and expansion of essentially the same design over the course of 45 years from the mid-1960s to the company's demise in 2003. The company frequently marketed the same design under different designations to multiple potential clients. The reason for this practice is not known; possibly it was intended to reduce the possibility of clients becoming aware of each others' capabilities and Cos.Mo.S' relationship with them, or possibly it was simply to create the impression that Cos.Mo.S produced and sold more units than was actually the case.
(click to enlarge)
SX-404
SX-404 was Cos.Mo.S’ first known venture into midget submarine design and production. This was a 40-ton boat intended to transport naval SOF operators into hostile waters over distances greater than those that could be achieved by the company’s Chariot swimmer delivery vehicles (SDVs). All Cos.Mo.S’ midget submarines were designed with the capability of carrying two of the company’s CE2F-series SDVs.
Cos.Mo.S built two subvariants of this design, the SX-404, two examples of which were delivered to Taiwan, and the SX-404/B, six of which were delivered to Pakistan. The two subtypes are easily distinguished from each other by the presence or absence of a large horseshoe step on the sail. Pakistan’s SX-404/Bs have this step, Taiwan’s do not.
Displacement: 40 tons
Length: 59.1 feet
Width: 6.5 feet
Draft: 8.4 to 10.4 feet
Surface Speed: 10kts (designed), actual 4kts
Submerged: 7.2 kts
Max depth: 131.2 feet
Range: 1235 nautical miles
Crew 4 Officers, 2 NCOs, 6 passengers
Payload: 2 SDVs (CE2F Chariots)
SX-404 (above) and SX-404/B (below), showing evolutionary changes between the two sub-types
SX-404
Taiwan
Taiwan was Cos.Mo.S’ first midget submarine customer, taking delivery of two in 1969. As originally delivered, Taiwan’s boats had rounded bows, which were later modified to the more common ship-type bow seen on most other of Cos.Mo.S’ boats. The two boats, S-1 and S-2 served until 1973. Both boats are preserved and are on public display at the Taiwan Naval Academy.
Taiwanese SX-404, original configuration
Taiwanese SX-404, final configuration
source: Cos.Mo.S. SpA
SX-404/B
Pakistan
In the late 1960s, Pakistan ordered six SX-404s to a slightly modified design. The Pakistani Navy deployed its six boats against the Indian Navy during the 1971 war. One of them, reportedly fitted with external torpedo tubes fired on an Indian naval frigate, INS Kukri, but the torpedo remained stuck in its external launcher. Of the six, one was lost with all hands as a result of an accident on December 27, 1976. Following removal from service, four were scrapped and one was placed ashore as an exhibit in the Pakistan Maritime Museum in Karachi.
Pakistani SX-404/B on display at Pakistan Maritime Museum, Karachi
source: internet
SX-506
Colombia's two SX-506s in port, Cartagena, Colombia, November 2009
source: authors
S20 ARC Intrepido
S21 ARC Indomable
1972 - 07 August: Arrival in Colombia
1973 - 17 April Intrepido commissioned
1973 - 03 July Indomable commissioned
1980 - both modernized, lengthend 6ft to accommodate air conditioning unit
1995 - batteries replaced; auxiliary systems updated to incorporate automatic load control
1998 - 1st participation in annual UNITAS exercises
2003 - steel plating on outer hull casings replaced with anticorrosive steel at COTECMAR
Missions: shallow-water operations, commando operations, tactical amphibious reconnaissance, underwater demolition, attacks on port facilities, offshore installations, anchored or moored targets, beach surveys and intelligence missions.
Propulsion:
1x Cummins diesel-electric, 300hp
1x 75hp engine generator
Battery: 24V 1100 Amp
1x screw
Displacement
Surface: 75 tons
Submerged: 90 tons
Autonomy: 20 days
Dimensions (2010):
Length: 23 meters
Beam: 2.2 meters
Height: 4 meters
Armament:
8x explosive charges from 50kg to 2050kg, including the charges onboard chariots.
Mines: 6x Mk-21; 8x Mk-50.
Other Equipment:
2x CE2F/X-60 Chariots capable of carrying 8 submarine commandos and explosive charges.
Note: SX-506s are almost indistinguishable externally from SX-756s. The two Colombian boats can be distinguised from one another when their snorkel masts are raised. The ball mechanism on top of Intrepido's mast is flattened, whereas Indomable's is spherical. Both are distinguishable from South Korea's SX-506s by the step mounted around the sail, which is absent on the Korean units. Colombia's SX-506s are sometimes referred to as SX-506/B as a result of their lengthening, however this designation is not used by the Colombians, who usually refer to them as "Submarinos Tacticos."
One of South Korea's two SX-506s prior to delivery
source: Cos.Mo.S SpA
wow our PAKISTANI BEHRYA ZINDABAD.
ReplyDeleteWE proud to be PAKISTANI.
Search Engines Services
Useful article, thank you for sharing the article!!!
ReplyDeleteWebsite bloggiaidap247.com và website blogcothebanchuabiet.com giúp bạn giải đáp mọi thắc mắc.
Are you looking for Bangalore escorts 6366-692-297 ? If yes then you have ended at the right place. You will have more fun with bangalore escorts. And great to comment on this post really cool and informative in this blog…
ReplyDeletebangalore-escorts69.blogspot ,
best Call girls in bangalore,
Russian Escorts in Bangalore,
MG Road Escorts in Bangalore,
Escort service in bangalore,
Call girls in bangalore,
jayanagar escort in bangalore,
Bangalore Escorts,
Escort in Bangalore,
Great to blog on this post really cool and knowledgeable in this blog..
High profile escort in bangalore(MG Road),
MG Road escorts,
Marathahalli female escort service in bangalore,
jayanagar escort in bangalore,
Indiranagar independent escort in bangalore,
Writing a post is not so easy, but when I saw your post, you were very surprised to see that someone can write such a good post, the rest of this post is less than I would like to be praised.
ReplyDeleteCall GIrls Sector 34
Gurugram escorts service
Medicity Escorts Service
escort service in Delhi
call girls gurugram
call girls in gurgaon
Thank you for sharing this post. After a long time, such a post has been seen, it is a very interesting subject, people like it. When someone shares this kind of article, the mind is happy Thank you for this article
ReplyDeleteCall Girls Sector 36
Escorts Girls sector 4
Gurugram Call Girls
Call Girls Faridabad
Airhostess Call girls Gurugram
Lemon Tree Escorts Service
Gurugram Call Girls
Call Girls Demo Cat Update
Call Girls Noida Sector 8
Call Girls In Vaishali
BUY WEED ONLINE
ReplyDeleteBUY IBOGAINE ONLINE
BUY XANAX ONLINE
BUY DANK VAPE ONLINE
BUY COCAINE ONLINE
BUY LSD ONLINE
BUY BLUE DREAM DANK VAPE ONLINE
BUY MOONROCKS ONLINE
BUY CARFENTANYL ONLINE
BUY IBOGAINE HCL ONLINE
call girls cartagena
ReplyDeletePrepago y e s c o r t, Victoria Guzman, años 18, ubicación Bogota, color de ojos Cafes, color de pelo Negro, color de piel Blanca, c a l l girl, tamaño de cola Normal, acompañante VIP
El catálogo mas completo de damas de compañía en Bogotá, Medellín y Cartagena.La única agencia con mas de 100 acompañantes o damas de compañía.✆(+57) 305-333-9945
ReplyDeletevisitar aquí : escorts bogota
Empleo Prepago
ReplyDeletePrepago y es c o rt, Shay, años 24, Nicole Zarate, color de ojos Cafés, color de pelo Castaño, color de piel Triguena, c a l l girl, tamaño de cola Brasileña, acompañante VIP.
Indore Escorts
ReplyDeleteVip Escorts in Goa
Goa Escorts
Bangalore Escorts
Nashik Escorts
Escorts colombia
ReplyDeleteThe best escorts, call girls, companions, hookers & whores in Colombia. Luxury escorts and companions.
ReplyDeleteNew Lahore Escorts Service Provider Miss Jiya 0323-3333153 VIP Call Girls In Lahore Best Hotel Room Services Available In Pakistani Female Models Escort Girls In Lahore Real Top Luxury Escorts In Lahore Hot Sex Call Girls
Double deal professional Call Girls In Lahore Services Available Pakistani Escort Beautiful Female Model Staff Lahore Call Girls Service Best Hotels Gullberg Lahore Johar Town Hotel Lahore
VIP Real Escorts Service Provider Miss Leena 03053777077 Call Now On WhatsApp Luxury Escort Girls
👩❤️ https://doubledealescorts.website/ 👩❤️
Escorts In Lahore
escort in Lahore
Lahore Escorts Service
Lahore Escort
Luxury Escorts In Lahore
Islamabad Escorts
Escorts In Karachi
Rawalpindi Call Girls
Call Girls In Lahore
Top Luxury Escorts In Lahore Agency | Best VIP Lahore Escorts Services Independent Call Girls In Lahore | +92 305 3777077 Miss Leena Escorts Girls Service Lahore
ReplyDeleteTo enjoy sex fully, you must have more than penetration in bed. Squirt out the naughty side of yours. Play games and stuff. Do things that might spice up the sex. Our Escorts Agency In Lahore | +92 323 3333 153 Miss Jiya Call Girls Provider that have experience in these things. They might chain you up and lick you all over. They might bend in ways where you can insert into her deep. They will wear sexy clothes like stockings, thongs, and undergarments that will give your thing a hard-on.
All these pleasures will take you to places you have never been before.
We understand that you would prefer a woman in bed who you like. Many prefer sexy busty housewives with gigantic buttocks, while some like perfectly chiseled young girls in the mid-twenties. Some even prefer college-going independent girls in bed—some like fun-loving party girls in Lahore Call Girls .
To enjoy sex fully, you must have more than penetration in bed. Squirt out the naughty side of yours. Play games and stuff. Do things that might spice up the sex. Our escorts agency In Lahore provides call girls that have experience in these things. They might chain you up and lick you all over. They might bend in ways where you can insert into her deep. They will wear sexy clothes like stockings, thongs, and undergarments that will give your thing a hard-on.
Best VIP Call Girls In Lahore
All these pleasures will take you to places you have never been before.
call girls colombia
ReplyDeleteThe best escorts, call girls, companions, hookers & whores in Colombia. Luxury escorts and companions.
Empleo Prepago
ReplyDeleteLas mejores prepagos escorts, call girls, putas, damas de compañía y acompañantes universitarias vip en Colombia La mejor agencia de Colombia.
prepagos veteranas
ReplyDeleteLas mejores prepagos escorts, call girls, putas, damas de compañía y acompañantes universitarias vip en Colombia La mejor agencia de Colombia.
Trabajar como prepago escort en bogota con buena paga, seguridad, discrecion y buenos clientes.
ReplyDeleteVisit here : Como ser escort