A submarine that can fire back at an aircraft hunting it certainly sounds intriguing, but is such a capability really relevant?
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I would like to pitch a conceptual design and operational doctrine for discussion regarding submarine air-defense. While projects like IDAS focus on tube-launched or sail-embedded systems with highly limited capacity, I am proposing a different approach:
Integrating a Vertical Launch System (VLS) on Midget Submarines (~200 tons) to deploy compact, thin-body SAMs like the RIM-116 (RAM) or the Turkish LEVENT, operating strictly from the surface.
Here is how the technical and tactical framework would look:
1. Form Factor & High-Capacity Volumetric Efficiency
Space and displacement are the ultimate constraints on a ~200-ton midget submarine. One might ask:
Why not use existing indigenous systems like HİSAR-A or the GÖKDENİZ ER (GÖKDOĞAN/BOZDOĞAN maritime variants)?
Technically, missiles like
HİSAR-A or air-to-air derived systems like NASAMs, Gökdeniz ,
Sidewinder and
IRIS-T possess the exact technological architecture required for this mission—they have advanced
Inertial Navigation System (INS) modules allowing them to be pre-programmed with estimated target coordinates before launch. However,
they are simply too bulky. Their large diameters, control surface wings, and overall volumetric footprints take up far too much premium space.
This is why the
RIM-116 or LEVENT are the ideal candidates. Their extremely slender body diameter and folding/low-profile wing surfaces allow them to be densely packed into a specialized, modular VLS cell array. A 200-ton platform could carry a surprisingly high volume of ready-to-fire interceptors compared to heavier SAMs.
2. EMCON-Compliant "Avcı-Pusu" (Hunter-Ambush) Doctrine
The operational profile relies entirely on passive surveillance to bypass enemy SEAD/SIGINT nets:
- Passive Detection on the Surface: The midget submarine operates in littoral zones, surfacing to periscope/deck level. It keeps its radar completely turned off (Strict EMCON). Utilizing mast-mounted or hull-integrated IIR (Imaging Infrared) tracking systems, it passively scans the horizon for low-flying threats trying to exploit radar blind spots—such as maritime patrol aircraft, UAVs, and cruise missiles.
- Pre-Programmed Inertial Guidance (No Datalink): The submarine's Combat Management System (CMS) calculates the target's estimated vector based on pure IIR data. Just like the pre-launch lock-after-launch (LOAL) programming seen in IRIS-T or HİSAR-A, this initial trajectory data is uploaded to the LEVENT/RAM missile prior to launch.
- The Necessity of INS: The missile relies strictly on its onboard INS for its mid-course phase, flying "blind" toward the intercept basket. There is no radio datalink between the submarine and the missile post-launch. This ensures zero RF emissions from the submarine, preventing enemy Electronic Intelligence (ELINT) from pinpointing the vessel's coordinates during the weapon's flight. Terminal guidance is autonomously handled by the missile's own IIR seeker.
3. Post-Engagement Phase: AESA Suppression & Egress
- Radar Suppression: Once the missile is away, the submarine's element of surprise is reduced. At this point, the midget submarine activates its integrated, low-probability-of-intercept fixed AESA radar panels.
- Area Control: The AESA radar is used to quickly screen the airspace, suppress localized electronic threats, and provide active targeting data for rapid-fire follow-up salvos if a secondary wave of targets emerges.
- Tactical Retreat: After exhausting its immediate targets, the submarine dives immediately, disappearing back into the shallow littoral waters. Any pursuing enemy anti-submarine warfare (ASW) surface vessels or hunter-killer submarines are then funneled into a trap, to be picked off by wider, networked friendly naval assets (corvettes, shore-based anti-ship missiles, or loitering munitions).
4. Platform Viability: The 200-Ton Midget Submarine
This doctrine does not require expensive, blue-water oceanic submarines. Instead, a cost-effective, highly manufacturable ~200-ton midget submarine (even smaller than the STM500 concept) is perfect. These vessels are intended for short-endurance, high-risk asymmetric denial operations in contested archipelagos or shallow littoral shelves (e.g., the Aegean or East Med).
How viable do you think a surface-fired VLS configuration is on a hull as small as 200 tons regarding buoyancy and stability during hot-launching? Also, do you think ROKETSAN's LEVENT can be easily adapted for a cold/hot vertical launch system while maintaining its compact nature? Looking forward to hearing your technical insights!
Should Levent consist INS module?