Subnautica 2 Vehicles: All Vehicles, Chassis and Upgrades

Updated 2026-11-02: added a status table for every vehicle name you'll see (including the Seafrog and Trident), what Unknown Worlds has said about the FROG chassis coming in Early Access 2, and a depth table showing what each Depth Module opens up. The main branch hasn't changed since Buddy System Hotfix 2 on October 6, so nothing below about the Tadpole, Haul or Scout Ray is out of date.

Subnautica 2 vehicles at a glance

The Tadpole has 100 health, four upgrade slots and a crush depth of 250m. Both chassis are built at the same Vehicle Fabricator as the Tadpole and dock automatically when the Tadpole gets close. Only one chassis fits at a time, and you can eject it while piloting.

Every Subnautica 2 vehicle and whether you can use it

Search "all vehicles in Subnautica 2" and you'll find pages mixing playable vehicles with names pulled from the game files. Here's the full list as of November 2, 2026, and where each one stands on Steam's main Early Access branch:

So the honest count on the main branch is one vehicle and two chassis. The official wiki's Vehicles page, last edited October 28, lists exactly that: the Tadpole, with the Scout Ray and Haul as its chassis. The Seafrog and Trident pages both carry the wiki's Experimental banner, which reads "exclusive to the Experimental Branch" and "subject to change."

*Video: Subnautica 2 Dev Vlog, Crafting the Tadpole, Subnautica official YouTube channel*

How to unlock and build the Tadpole

1. Scan three Tadpole fragments. The wiki lists thirteen spots between 35m and 150m. The easiest cluster is the Tadpole Pens (one docked inside, one outside the front hatch, one to the southwest), with others beneath the Great Jaw, in the Lander Garage wreck and near the Old Habitat.
2. Build a Moonpool in a seabase room. Its blueprint comes from Recipe Data Cards at the Tailings Village, the Tadpole Pens and the Canteen wreck, or from scanning two Tadpole fragments. It costs 4 Titanium.
3. Place the Vehicle Fabricator on the Moonpool's edge. It unlocks with the Tadpole blueprint, costs 2 Titanium Ingot, 1 Copper Ingot and 2 Glass, and needs floor space behind the Moonpool. It draws 5 energy per second.
4. Fabricate the Tadpole and add a Tadpole Dock. The Tadpole recharges its Power Cell while docked. Away from base you can pull the cell out of the socket on top and charge it by hand.

The Lifepod Fabricator won't get you there on its own: the wiki notes it is corrupted and can't make advanced recipes, so a seabase is the first real step toward any vehicle.

Image: Subnautica 2 screenshot, Unknown Worlds Entertainment. The Vehicle Fabricator and Tadpole Dock both mount on a Moonpool, so plan the room before you plan the sub.

Haul Chassis: the group and cargo option

The Haul adds two side seats and a top handlebar, so four players ride one vehicle, and each spot has an oxygen port. Its 30-slot storage works even when the chassis is parked, and the two side hardpoints take extra Portable Lockers. An underside camera helps you spot resources. The cost is acceleration: top speed stays at 8 m/s but it takes much longer to get there.

The fragments are deep. The wiki's five spots are on the southwest side of the Karakorum Metal Farms (465m), just south of the Stairway to Heaven (205m), inside the Needler Nest (290m), outside the Therapy Room wreck (220m) and beside the Axum Vision Angel Comb (455m). Three of those are past stock crush depth, so fit the Depth Module Mk. 1 first or swim the last stretch.

In co-op this is the chassis we'd build first. One Haul moves the whole team to a new site, and Buddy System Hotfix 1 fixed the bug where players hanging on a Tadpole or Haul didn't get oxygen.

Scout Ray Chassis: speed for scouting

The Scout Ray adds two wings with extra engines and raises top speed to 10 m/s, with better acceleration and turning. The wings fold away when you get out, but the chassis makes the Tadpole much wider, so drop it before tight caves. It adds no cargo of its own beyond one hardpoint.

You don't hunt fragments for it. Scan the Scout Ray attached to the Tadpole docked in the Tadpole Pens and the blueprint is yours. Because it mounts on the Tadpole's own hardpoint, unhook any locker first or it won't dock.

Tadpole upgrade modules

Modules are crafted at the Modification Station after you find each Recipe Data Card, then slotted into the panel behind the Tadpole's Power Cell socket.

Our order: Depth Module Mk. 1 first, because the Haul fragments and the Muffler card sit below 250m. Its own card is at about 295m, so park the Tadpole above the Needler Nest and swim the last stretch. Strike Armor next, since a Collector grab and every bump into rock come off the same 100 health. Fill the last two slots with Engine Efficiency for long trips. The Photovoltaic Charger only helps if you spend a lot of time in the shallows by day. The Tadpole upgrades guide walks the data cards in route order.

What each depth rating opens up

Every depth in this table is from the wiki pages this guide already cites, sorted by the crush depth you need to drive all the way there:

The last row is the catch. Two of the five Haul fragments sit just past the Mk. 1's 450m rating, and the Mk. 2 isn't obtainable in Survival, so those two always end with a short swim down from the Tadpole. You only need three fragments, and the three shallower spots are enough, so we'd skip the deep pair entirely.

Go past crush depth and the computer warns you first, then the hull takes damage for as long as you stay below. At zero health the Tadpole explodes and has to be repaired back to full with the Repair Tool before it moves again.

Image: Subnautica 2 screenshot, Unknown Worlds Entertainment. Teammates can grab the Tadpole's side handlebars instead of swimming the whole route.

Vehicle fixes in the patch notes

• Hotfix 2 (May 22): Hammerheads are less drawn to Tadpole lights; before, they followed players home and loitered at the base.
• Hotfix 3 (June 1): Hammerheads no longer attack an unpiloted Tadpole, though they can still take an interest in one you're driving.
• Early Access 1.1, Adaptive Measures (July 8): the Vehicle Dock and Fabricator got smaller footprints and clearer placement messages, including a prompt when the Moonpool is too small.
• Early Access 1.2, Buddy System (August 19): Tadpoles destroyed outside the Early Access boundary now teleport back inside so you can recover them.
• Buddy System Hotfix 1 (September 1): fixed the Scout Ray carry point, oxygen for players attached to a Tadpole or Haul, and blocked inventory sharing while riding.
• Buddy System Hotfix 2 (October 6): fixed docking in some orientations and destroyed Tadpoles with chassis attached failing to return in bounds.

None of these updates added a new vehicle, and Steam's public branch hasn't been patched since Hotfix 2 on October 6.

What's coming: the FROG chassis in Early Access 2

The next vehicle is a chassis, not a submarine. In the October 15 dev vlog that opened the Voyage to Early Access 2 series, Creative Director Anthony Gallegos called "the Sea Frog chassis, or the Frog Chassis, as it's actually called in the game" one of the update's highlight features: "a new buildable chassis for the Tadpole that gives you arms and legs." He tied it to the new region EA2 adds and said he thinks it will change the way the game feels there.

That matches the official wiki, where the "Tadpole Seafrog Chassis" page carries the Experimental banner and the Experimental Branch page lists it under new vehicles. The wiki also links it to the Bullfrog Workmech the PDA mentions: its gallery labels a "Bullfrog Workmech" model as the Seafrog's early version, and it records a July 30 Discord poll in which senior narrative designer Seth Dickinson asked whether players preferred Seafrog or Bullfrog before the team settled on FROG. The Tadpole's databank already promised chassis "ranging from high-speed hydrofoils to powerful workmechs."

Two things we would not plan around yet:

1. A date. Unknown Worlds hasn't given one for Early Access 2. Its Experimental branch announcement says builds go up "shortly before release to the wider public," and Steam shows the Experimental branch got a new build on October 29. Read that as a hint, not a schedule.
2. The Trident. The wiki's page says the big submarine "is not operable in the current implementation" even on Experimental. It also quotes a Discord post from Gallegos saying he wants the big sub "recoverable, rather than destroyed," unlike the original game's Cyclops. Nothing official says when you'll drive it.

If you want a preview anyway, the Experimental branch is opt-in through Steam's "Game Versions & Betas" tab, and saves don't carry between branches, per Unknown Worlds' post. For everything else the update brings, our Subnautica 2 Early Access updates tracker follows each patch and vlog, and what's coming after Hotfix 3 covers the roadmap as it stood in June.

Related Reading

• Subnautica 2 Leviathan Guide: which Leviathans grab or ram a Tadpole, and how to drive past them.
• Subnautica 2 Weapons Guide: what you have instead of a gun when the Tadpole gets attacked.
• Subnautica 2 Tadpole Upgrades Guide: the module data cards in route order.
• Subnautica 2 Base Building Guide: power, the seabase Fabricator and where a Moonpool fits.
• Subnautica 2 Co-op Guide: splitting roles in a four-player session.
• Subnautica 2 Collector Leviathan Guide: the Leviathan that patrols above the Metal Farms, near the Haul fragments.
• Subnautica 2 Biomes Guide: what sits at each depth.
• Subnautica 2 Complete Guide Hub: every Subnautica 2 guide on the site.
• Subnautica 2 Beginner Guide: what to build before your first seabase.
• Subnautica 2 Great Jaw Leviathan Guide: one Tadpole fragment sits beneath the Great Jaw.
• Subnautica 2 Adaptive Measures Update: the full EA 1.1 patch, including the Moonpool and dock changes.

References

• Tadpole, Subnautica 2 Wiki: stats, recipe, fragment locations, chassis and databank entry.
• Vehicles, Tadpole Seafrog Chassis, Trident and Experimental Branch, Subnautica 2 Wiki: the vehicle list and what is Experimental-only.
• Voyage to Early Access 2 Begins: Unknown Worlds' October 15 dev vlog announcing the FROG chassis.
• Tadpole Haul Chassis, Subnautica 2 Wiki: seats, storage, recipe and fragment spots.
• Tadpole Scout Ray Chassis, Subnautica 2 Wiki: speed, unlock and recipe.
• Vehicle Fabricator, Subnautica 2 Wiki and Moonpool: where vehicles are built.
• Vehicle Upgrades, Subnautica 2 Wiki and Depth: module effects and crush depth.
• Subnautica 2 Early Access Hotfix 3 and Buddy System Hotfix 1: Unknown Worlds patch notes on Steam.
• Subnautica 2 on Steam