Sunday, December 26, 2010

MS-29 Yono / IS-120 Ghadir Class Midget Sub - research quest

There is something of an ongoing quest by Open Source Intelligence enthusiasts to piece together a better understanding, and balanced view, of the North Korean 'Yono class' midget submarine, and its related types in service with other countries, particularly Iran where it is called the IS-120 Ghadir Class. Iran is deploying it in growing numbers within the Persian gulf, with at least 11 operational at this time.
Iranian IS-120. Image: FARS News

Another blog post covering it is here

Here are the latest estimated views showing the internal layout as discerned from video and other evidence:

There have been many iterations of these sketches and the 3D model, but each has differed in minute detail that only the most enthusiastic observer might notice.

The original schematic/cutaway sketch was by the blogger Plane Man. We can now see that it was wrong in almost every detail, but correct in many ways too. It acted as the starting point of this project.

The first key error is that the small cylindrical item between the railings at the front of the fore deck is not a crew access. Instead the crew access in the main sail is in fact entering the 'torpedo room' - the video was misinterpreted. Another early sketch by Plane Man had similar errors:

Below it is a screen capture of our scale model from about the same angle, with many sections transparent. As you can see, the older sketch has forward hydroplanes which are mounted too high up and are much too large. Also evident is that the navigation lights on the sail (red on port, green on starboard) are misinterpreted as windows in the older sketch.

Although the original source is not clear (if you know please tell us so that we can give credit!), this South Korean sketch which we found during research turns out to be very good, although not exactly as per the IS-120 model:
(Red annotations added)

Another RoK illustration (author/source unknown to this author) of the related but smaller P-4 class submarine was also useful:

An earlier model of the MS-29 was created by TLAM Strike using SubSim game modelling approach.

Compared to the IS-120 model/sketches, the above MS-29 model has a more rounded nose and lacks the toothed edge between the upper deck cladding and the pressure hull. This is not incorrect, rather it shows some of the observed differences between the IS-120 and the early-production MS-29. The model shows externally mounted torpedoes which conforms to some DPRK defector accounts. This arrangement is either altogether wrong or more likely mixes up various DPRK submarines - whichever, the account of the defector are otherwise credible and extremely enlightening. William Magoffin was among the researchers contributing to this effort and has modelled many North Korean submarines, creating excellent visualisations.

The main break however came from several videos of the internal arrangement of the Iranian IS-120 shown on Iranian news channels and available in poor resolution on Youtube:


  1. Arsitektur Rumah Indonesia

    1. IEEE Final Year Project centers make amazing deep learning final year projects ideas for final year students Final Year Projects for CSE to training and develop their deep learning experience and talents.

      IEEE Final Year projects Project Centers in India are consistently sought after. Final Year Students Projects take a shot at them to improve their aptitudes, while specialists like the enjoyment in interfering with innovation.

      corporate training in chennai corporate training in chennai

      corporate training companies in india corporate training companies in india

      corporate training companies in chennai corporate training companies in chennai

      I have read your blog its very attractive and impressive. I like it your blog. Digital Marketing Company in Chennai Project Centers in Chennai

  2. Jasa Desain Arsitek dan Kontraktor

    1. Pengolahan Siteplan
    Pemahaman kondisi sekitar serta pembuatan layout jalan dan kavling
    Fee: Rp. 1.000 – 5.000 / m2

    2. Pembuatan Konsep dan Perencanaan Arsitektural
    Gambar Pra-rencana, pemilihan tema desain, studi fasade, dan perencanaan denah
    Fee: Rp. 50.000 – 100.000 / m2

    3. Pembuatan Rancangan Teknik Terinci
    Pembuatan Gambar Kerja sebagai acuan pengerjaan oleh tukang di lapangan
    Meliputi gambar2 rencana dan detail yang diperlukan dalam pembangunan
    Fee: Rp. 25.000 – 50.000 / m2

    4. Perhitungan Struktur
    Penentuan spesifikasi dan dimensi elemen struktur dari konstruksi rumah 1 dan 2 lantai
    Hitungan dan Gambar Struktur untuk melengkapi RAB
    Fee: Rp. 10.000 – 20.000 / m2

    5. Jasa Desain Interior
    Mewujudkan konsep dan ide-ide anda dengan menggunakan jasa desainer kami
    Pengolahan ruang yg efektif, fungsional dengan ide desain yg inovatif
    Fee: Rp. 100.000 – 150.000 / m2

    6. Biaya Pembuatan Perspektif Interior / Eksterior
    3Studio MAX image with V-ray rendering and material mapping (Photoreal)
    View ditentukan oleh klien
    Fee: Rp. 500.000 – 1.000.000 / View

    7. Jasa pembuatan maket presentasi kawasan
    Skala 1 : 100 Ukuran display ( 120 x 80 cm)
    Gambar arsitektur disediakan oleh klien
    Fee: Rp. 5.000.000 – 10.000.000 / View

    8. Biaya Pembuatan Marketing Support
    Meliputi Pembuatan Desain Brosur, Poster dan Iklan Media Cetak
    Fee: Rp. 1.000.000 – 3.000.000 / Paket

    9. Biaya Pembuatan RAB unit rumah
    Penentuan spesifikasi dan harga bangunan serta perkiraan harga pokok pembangunan
    Fee: Rp. 10.000 – 15.000 / m2

    10. Biaya Pembuatan Gambar IMB
    Gambar arsitek disediakan oleh owner
    Fee: Rp. 1.000 – 3.000 / m2

    11. Jasa Soil Test ( bisa melayani untuk eksplorasi )
    Soil test untuk rumah tinggal terdiri atas 3 titik sondir dan 1 boring
    Fee: Rp. 10.000.000 – 25.000.000 / m2

    12. Project Supervising
    Supervise the progress on field (2 days a week)
    Fee: Rp. 5.000.000 – 10.000.000 / bulan

    13. Contractor
    Fee: 10% of Total Project Value

    14. Cost & Fee / Borongan Tenaga
    Bahan material bangunan dari owner
    Fee: Rp. 500.000 – 1.500.000 / m2

    15. Renovasi Bangunan / Borong Keteng
    Bahan material bangunan dari owner
    Fee: Tukang & Kenek : Rp. 75.000 – 100.000 / hari

    16. Feng Shui Untuk Rumah Anda
    Menentukan arah hadap pintu masuk, posisi r. tidur, r. kerja, dapur berdasarkan
    tahun kelahiran ( Pa Kua & Lho Shu )
    Fee: Rp. 2.000.000 – 5.000.000 / rumah

    17. Paling Hemat. Dapatkan Paket Flat Jasa Desain Rumah Hanya 6 Jta
    Berlaku untuk rumah dengan luasan dibawah 300 m2 (non komersil):
    1. Gambar Arsitektur
    2. Gambar Struktur
    3. Gambar Sanitasi & Elektrikal
    4. Gambar 3D Eksterior & Interior
    5. Gambar Perizinan IMB
    6. RAB Rencana Anggaran Biaya
    Fee: Rp. 6.000.000 / rumah

    *)Kunjungan klien dan survey ukur lahan dilakukan setiap sabtu - minggu dengan perjanjian
    Hubungi segera :
    PT. Diorindo Graha Perkasa
    Jl. Harapan Mulia Raya no.1B
    Telp: (021) - 9138 6230
    Mobile: (0812) - 8769 8336
    Untuk konsultasi silahkan klik di sini...

  3. First of all I would like to thank you for writing this post I love both writing and reading new posts and I was just looking at new posts to see me something new, only then I saw your post and the rest of the post is praiseworthy. .

    Gurugram Escorts
    Bhiwadi Escorts
    Escorts in Sector 16
    Noida Call Girls
    call girl gurugram
    Gurugram Escorts

  4. Great work welldone call girl amritsar

    Great work welldone call girl chandigarh

    Great work welldone amritsar call girl
    Great work welldone escorts service amritsar

    Great work welldone call girl amritsar
    Great work welldone amritsar call girls
    Great work welldone amritsar call girls
    Great work welldone call girls amritsar

    98777-77762 They have no issue with going with you to an entire assortment of occasions and plans which you may have up coming. The majority of our allies have the suitable social abilities to meet and converse with new individuals

    The models in particular in the city meet the basic requirements and the qualities of the glamour industry. People are familiar with other secrets of model in the city of Amritsar. Here we can give you the best and the most sizzling ever Escorts in Amritsar at a moderate rate and with the best sort of services individually. Late-evening social occasion and hookups are the best way to deal with so you can contemplate yourself and about anybody individually. This is the reason we are here the absolute best and well endowed ever Amritsar Escorts around. It would be progressively exquisite if you incorporate a sizzling cum flawless Female Escorts in Amritsar in your social gathering. That you simply expected to completely stack up with a female escort in Amritsar which suits you in lovemaking.

  5. If you are watching this post, please like it and I am doing the same, in fact, your post is very beautiful, the content written in it is girls in gurugram
    escort service in Delhi

    call girls in gurugram

    call girls in DLF phase 3

  6. I loved your post so much I became a fan of you, promise that you will continue to share such good and knowledgeable posts even further, we will be waiting for your post thank you.
    Independent Call Girls In DLF Phase 2
    Escorts Service In DLF Phase 3
    Sushant Lok Escorts Service


    Female Escorts In Sector 41
    Bhiwadi Escorts Service
    Hello Call Girls