Cosmonautics: Deep Air

Cosmonautics: Deep Air

Compatibility bridge between Create: Deep Seas and Cosmonautics. Lets entities breathe normally while inside a sealed, unbreached, oxygenated sable sublevel.

by
19.1K Downloads
neoforgegame-mechanicstechnology
Rent Server with this Mod

Screenshots

Gravity Blocks
Gravity System 2
Deep Sea's Air System

About this Mod

About Cosmonautics: Deep Air

This mod simply adds localized air and gravity to cosmonautics using deep seas systems, this is just a temporary solution until air is added to cosmonautics standalone.

There is 1 major caveat to gravity, and that is atleast 1 room in your ship will need air due to deep sea memory cleanup.

Dependencies

Create
Create Aeronautics
Sable
Cosmonautics
Create: Deep Sea

** Optional, but one of the three is required. (Or any mod that allows the generation and transport of FE)

Create Addition
Create New Age
Create Power Grid

Available Versions

Cosmonautics: Deep Air 1.0.2release
MC 1.21.1neoforge
June 24, 2026
Cosmonautics: Deep Air 1.0.1release
MC 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11neoforge
June 24, 2026
Cosmonautics: Deep Air 1.0.0release
MC 1.21.1neoforge
June 23, 2026

How to Install Cosmonautics: Deep Air on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.11).

3

Install Mod

Open the mod browser in the dashboard and search for "Cosmonautics: Deep Air". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+8 more)

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Cosmonautics: Deep Air server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is Cosmonautics: Deep Air compatible with neoforge?

Cosmonautics: Deep Air officially supports neoforge for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Cosmonautics: Deep Air – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Cosmonautics: Deep Air consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Cosmonautics: Deep Air with just one click on your server.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.2+1 more