sonar

  1. L

    CAPTAS

    So there were three CAPTAS (low frequency active/passive towed variable depth sonar, huge detection ranges and not countered well by anechoic tiles or the sub being silent): CAPTAS-1 for corvettes (300+ t) CAPTAS-2 for small/medium frigates (4,000+ t) CAPTAS-4 for big frigates (6,000+ t) and...
  2. PreMars

    Van Speijk class frigate sonar types

    I saw on Wikipedia that the ships were fitted with Type 162 and Type 170B sonars when in service. Does that mean the class did not have a variable-depth sonar (VDS) at that time? After the modernization, did the Royal Netherlands Navy update the sonar systems? By the way, I noticed that the...
    • PreMars
    • Thread
    • cold war frigate leander class royal navy royal netherlands navy sonar
    • Replies: 4
    • Forum: Military
  3. Grey Havoc

    TNI-AL SOSUS equivalent?

    https://www.navalnews.com/naval-news/2025/04/indonesian-navy-seeks-sosus-like-systems-to-detect-foreign-submarines/
    • Grey Havoc
    • Thread
    • anti-submarine warfare coastal defences cold war ii indonesian navy republic of indonesia sonar tentara nasional indonesia-angkatan laut tni-al
    • Replies: 2
    • Forum: Secret Naval Projects
  4. A Tentative Fleet Plan

    US Mid-1960s Ocean Reconnaissance Ship

    From Norman Friedman's US Small Combatants, pages 319-323 (most of those pages are pictures of PBRs, a Coast Guard 82-footer and a 57-ft Minesweeper Boat) Table 12-5. Schemes for Ocean Reconnaissance Ships, 31 March 1966 A B C D E May 1967 LBP (ft) 317.5 311 311 315 — 374 LOA...
    • A Tentative Fleet Plan
    • Thread
    • 1960s anti-submarine warfare cold war late 1960s maritime reconnaissance oceanographic research research ship sonar strategic reconnaissance tactical reconnaissance u.s. navy united states navy
    • Replies: 2
    • Forum: Secret Naval Projects
  5. DWG

    Project CABOT

    See https://www.navalnews.com/naval-news/2025/02/uk-sets-out-project-cabot-ambition-to-deploy-autonomous-asw-screen-in-the-north-atlantic/ TLDR: Project Cabot proposes as Phase 1 "Atlantic NET" coverage of GIUK gap using a COCONO (contractor owned, contractor operated, naval oversight)...
    • DWG
    • Thread
    • anti-submarine warfare cold war ii late 2020s naval drone north atlantic treaty organisation robotics royal navy sonar united kingdom usv uuv
    • Replies: 49
    • Forum: Military
  6. Grey Havoc

    R/P FLIP (FLoating Instrument Platform)

    Some good news, along with a bit of background: View: https://www.youtube.com/watch?v=y36pTr09f3Y https://www.yahoo.com/news/u-navy-flipping-ship-upcycled-134616867.html https://gcaptain.com/saving-rv-flip-from-the-wreckers-clawsand-its-story-is-mind-blowing/...
    • Grey Havoc
    • Thread
    • acoustic research anti-submarine warfare cold war cold war ii department of the navy early 21st century experimental late 20th century oceanographic research office of naval research post-cold war research research ship research vessel flip scripps institution of oceanography sonar u.s. navy united states navy uss flip war on terror
    • Replies: 4
    • Forum: Military
  7. Tzoli

    British Electronics "Type" Designations

    I've tried to collect all the British Type designations for electornics like Sonars, Radars, Jammers etc Here is the list: If anybody know more designations and their design/cancellation/introduction dates that would be great: Type 1 - Land Based Air Search Radar (1935/36) Type 2 - Land Based...
    • Tzoli
    • Thread
    • british army british commonwealth cold war electronics great britain interwar period naval radar radar royal air force royal navy sonar united kingdom world war ii
    • Replies: 17
    • Forum: Designation Systems
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