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  "description": "Where to grab the recipe data card that unlocks the Tadpole's stealth upgrade near the Blackbox - Zip 2 trench.",
  "path": "/cavitation-muffler-blueprint-location-in-subnautica-2/",
  "publishedAt": "2026-05-19T09:16:28.000Z",
  "site": "https://allthings.how",
  "tags": [
    "@HeRo"
  ],
  "textContent": "The Cavitation Muffler is a Tadpole upgrade module in Subnautica 2 that reduces the noise your submarine makes, lowering the chance that hostile creatures notice you. The blueprint isn't earned through scanning fragments. Instead, you pick up a single Recipe Data Card from a piece of wreckage in deep water near the Blackbox - Zip 2 trench.\n\n⚡\n\nQuick answer: Travel to the Blackbox - Zip 2 beacon roughly 2,055m from the Alien Ruins area, descend along the red barrier wall, and grab the Cavitation Muffler recipe data card from wreckage on the seabed near the Thermal Plant.\n\nImage credit: __Unknown Worlds Entertainment (via YouTube/@HeRo Survival Guides)__\n\n* * *\n\n### What you need before going\n\nThe trench is deep, narrow, and runs alongside a red kill barrier that instantly kills you if you cross it. You don't need a Tadpole with a depth module to grab this specific blueprint, but having one makes the trip far safer. On foot, the dive is survivable with the right loadout.\n\nRecommended gear| Purpose\n---|---\nHigh Capacity Air Tank| Extends underwater breathing time for the deep descent\nAir Bladders (3–4)| Emergency oxygen refills mid-dive\nSeaglide or Wakemaker| Faster travel down and back up the trench\nTadpole with Depth Module| Optional but heavily recommended for safety and speed\n\n* * *\n\n### How to reach the Cavitation Muffler data card\n\n**Step 1:** Set the Blackbox - Zip 2 beacon as your destination. From the surface, it sits roughly 2,055m out, near the Alien Ruins marker. Swim to the area on the surface to conserve oxygen.\n\n**Step 2:** Once you're above the trench, dive straight down toward the Blackbox - Zip 2 marker. You'll quickly run into a tall, red, grid-like barrier in the water. Stay parallel to it and never cross. Touching the other side results in instant death.\n\nImage credit: __Unknown Worlds Entertainment (via YouTube/@HeRo Survival Guides)__\n\n**Step 3:** Descend along the rocky cliff face next to the barrier. Use an Air Bladder when oxygen gets low to surface yourself briefly, then continue down the narrow trench until you reach the seabed.\n\n**Step 4:** On the ocean floor, you'll see a Thermal Plant structure and surrounding wreckage adjacent to the red barrier. Look for the wreckage with a small data box on it. The interaction prompt reads \"Take Cavitation Muffler recipe data card.\"\n\n**Step 5:** Interact with the data box. Two notifications appear on screen: \"MODIFICATION STATION | NEW BLUEPRINT SYNTHESIZED\" and \"CAVITATION MUFFLER UNLOCKED!\" The blueprint is now permanently added to your Modification Station.\n\nInteract with the data box | Image credit: __Unknown Worlds Entertainment (via YouTube/@HeRo Survival Guides)__\n\n* * *\n\n### How the unlock works\n\nRecipe Data Cards in Subnautica 2 are one-pickup unlocks. The card looks like a horizontal white box with a small hologram of a computer chip floating above it. Picking it up immediately adds the recipe to your Modification Station without needing multiple scans or fragment collection.\n\nYou'll know it worked when the \"CAVITATION MUFFLER UNLOCKED!\" message appears on screen and the module shows up under your Tadpole upgrade options at any Modification Station.\n\n* * *\n\n### What the Cavitation Muffler does\n\nOnce crafted at a Modification Station and slotted into your Tadpole, the Cavitation Muffler dampens the engine's acoustic signature. Hostile fauna that rely on sound to detect you are less likely to give chase, which makes deep exploration and trips through predator-heavy zones considerably less dangerous.\n\nImage credit: __Unknown Worlds Entertainment (via YouTube/@HeRo Survival Guides)__\n\n* * *\n\n### Avoiding a wipe on the way back\n\nThe trip back up is where most players die. Oxygen runs out fast at the bottom of the trench, and hostile creatures patrol the cliff faces near the wreckage above the seabed. Keep at least two Air Bladders in reserve for the ascent, and consider scanning the nearby Thermal Plant, Metal Farm fragments, Tadpole Hull Chassis, and Hydroelectric Turbine fragments while you're already down there to make the dive worthwhile.\n\n⚠️\n\nIf you die before reaching a Biobed or surface respawn, you'll be reprinted at your base and lose anything you were carrying. Grab the data card first, then scan extras on the way up only if oxygen allows.\n\nWith the blueprint secured, slot the Cavitation Muffler into your Tadpole at any Modification Station, and the upgrade is active immediately. It's one of the more useful early-to-mid game modules for anyone planning to venture into deeper biomes where aggressive wildlife is the main threat.",
  "title": "Cavitation Muffler Blueprint Location in Subnautica 2",
  "updatedAt": "2026-05-19T09:16:30.100Z"
}