About S-21 "Maria"
From Steam WorkshopA combat boat for 3-8 people, it features a full range of weapons and good armor. Originally designed as a landing submarine, it has a spacious airlock and plenty of space for diving equipment. The…
A combat boat for 3-8 people, it features a full range of weapons and good armor. Originally designed as a landing submarine, it has a spacious airlock and plenty of space for diving equipment. The ship's heavy armament and armor come at the cost of its maximum speed. It also features a power distributor, allowing your engineer to more precisely manage the submarine's power grid.
Main Performance Characteristics
[table] [tr] [th]Characteristics[/th] [th]Description[/th] [/tr] [tr] [th]Class[/th] [th]Combat[/th] [/tr] [tr] [th]Price[/th] [th]15600[/th] [/tr] [tr] [th]Main Armament[/th] [th]1 magnetic cannon, 1 twin magnetic cannon, 1 railgun, 1 small slot. [/th] [/tr] [tr] [th]Auxiliary Armament[/th] [th]Discharge Coil, Bomb Launcher[/th] [/tr] [tr] [th]Fabricators[/th] [th]Fabricator, Deconstructor[/th] [/tr] [tr] [th]Cargo Capacity[/th] [th]8 Crates[/th] [/tr] [tr] [th]Spacesuit Racks[/th] [th]8 pcs[/th] [/tr] [tr] [th]Batteries[/th] [th]1 pc. - Capacity 500, Power 500[/th] [/tr] [tr] [th]Reactor[/th] [th]Power 4000 kW, Fuel Consumption -0.3[/th] [/tr] [/table]
The ship is part of the “Red Line” series of submarines, which has some common features:
-All submarines of the series are designed for your modifications during the game.
-All submarines of the series are created in a near vanilla style (without complex decorations).
-All APL series specifically have both characteristic strengths and weaknesses.
You can see other boats in this series here: https://steamcommunity.com/sharedfiles/filedetails/?id=3500533846
Archive: https://discord.gg/NYqfzNtQ
Highlights
From source dataFootprint
Rated a light load on a server.
Last update
Its author last shipped an update 9 mo ago.
S-21 "Maria" on Nxeon
From our catalogue- One-click install
- Not available. One-click install isn't available for this game's mods yet. Download it and upload it to your server in Files.
- Server load
- light
- Smallest plan we suggest
- Barotrauma — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 2026-01-22, released 2026-01-22
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Workshop |
From 1 recorded build of S-21 "Maria".
Run S-21 "Maria" on a Barotrauma server
Deploy a server above, then upload the file in Files.
What kind of mod it is
From the catalogVehicles & ships
Cars, boats, aircraft, ships and other things to drive or fly.
Compatibility
- Game
- Barotrauma
Verified at the source
- ✓Steam WorkshopOfficial listing, checked 2026-10-10Open ↗
- ✓AuthorDOXLUY_KOT, as published on Steam Workshop
- ✓LicenseNot published by the sourceFree

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