Sea Dragon (SEA) by NecroBones CKAN

The infamous, never-built Sea Dragon rocket, in its full scale glory!

License: CC-BY-NC-SA 4.0

Game Version: 1.9.1

Source code: zer0Kerbal/SeaDragon

Downloads: 41,270

Mod Website: Forum Thread

Support this mod: Donate

Followers: 40

Outdated Mod

This mod is not known to work with the latest version of Kerbal Space Program. Proceed with caution.

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Sea Dragon (SEA) KSP version License
Curseforge GitHub SpaceDock CKAN

Sea Dragon (SEA)

The infamous, never-built Sea Dragon rocket, in its full scale glory!

By zer0Kerbal, originally by NecroBones aka Orvidius

adopted with express permission and brought to you by KerbSimpleCo

SeaDragon Hero



These rocket parts ARE NOT stock balanced! They're using the real world mass ratios, thrusts, ISPs, dry weights, and so on.

Preamble by NecroBones

The "Sea Dragon" was a proposed rocket design, that was intended to be built using shipyards, and launched from the ocean. Designed with inexpensive operatings costs in mind, it would have used simple construction, but on a large scale. It was inteneded to be fueled at sea, and use a nuclear aircraft carrier as the power source to generate the hydrogen and oxygen needed. While the design was solid in many ways, it was also unusually ambitious, and perhaps required a bit of insanity to truly appreciate. :)

See More

YouTube review by Connor Hetner

KSP: Sea Dragon

Help Wanted

  • Updated to be both Stock and RO/RSS/RP compatible
  • Compatibility patches
  • Contracts for these glorious parts
  • Variant Textures
  • Model updates (add/improve lights, iva, hatches and so forth)
  • Marketing Images and Videos such as hero shots, animated gifs, short highlights
  • Translations: See the README in the Localization folder for instructions for adding or improving translations. There is also the quickstart guide. GitHub push is the best way to contribute. Additions and corrections welcome!
  • Have a request? Glad to have them, kindly submit through GitHub.


  • English English
  • your translation here

Installation Directions [^1]

Use CurseForge/OverWolf Website/App

CurseForge/OverWolf App

orCKAN App

I take no part, nor am I interested in maintaining the CKAN metadata for my mods. CKAN is a great mod for those that can't use zip tools. If you are having issues please let the CKAN people know and refer to the CKAN thread. My support of CKAN extends with checking the checkbox in SpaceDock. Beware, CKAN can really mess up; though it tries very, very, very hard not to.






parts, config

red box below is a link to forum post on how to get support

How to get support

Be Kind: Lithobrake, not jakebrake! Keep your Module Manager up to date

Credits and Special Thanks

Legal Mumbo Jumbo (License provenance)

Current (1) - zer0Kerbal

Forum: Thread - Source: GitHub
License: License License


All bundled mods are distributed under their own licenses
All assets, including but not limited to: animations, models, sounds and textures are distributed under their own licenses

see Notices for more legal mumbo jumbo

Original (0) - Author: NecroBones

Forum: Thread - Download: SpaceDock - Source: CurseForge
License: License License

How to support this and other great mods by zer0Kerbal

Completely voluntary, absolutely amazing, and really does help me out a lot!
quote from <alt="cybutek" src="" width="25px" height="25px"> cybutek creator of Kerbal Engineer

Support Github Sponsor Patreon Buy zer0Kerbal a snack

and it is true.

Connect with me

Track progress: issues here and projects here along with The Short List

zer0Kerbal | zer0Kerbal | CurseForge zer0Kerbal | reddit zer0Kerbal | Patreon zer0Kerbal | YouTube zer0Kerbal | Twitch zer0Kerbal | PayPal zer0Kerbal | Buy Me a Coffee zer0Kerbal | Twitter

Release Schedule
  1. GitHub, reaching first manual installers and users of KSP-AVC. Right now.
  2. CurseForge. Right now.
  3. SpaceDock (and CKAN users). Soon™ (the button was pressed)

[^1]: this isn't a mod. ;P
[^2]: may work on other versions (YMMV)
[^3]: Be Kind: Lithobrake, not jakebrake! Keep your Module Manager up to date!

Version 0.3.4 for Kerbal Space Program 1.9.1

Released on 2016-07-12

0.3.4 (2016-07-12) - Tweak.

  • Slightly increased heat tolerance of first stage parts.

Download (10.35 MiB)

Version 0.3.3 for Kerbal Space Program 1.1.3

Released on 2016-05-11

0.3.3 (2016-05-11) - Minor hotfix.

  • Corrected staging problems in sample rockets.

Download (10.35 MiB)

Version 0.3.2 for Kerbal Space Program 1.1.2

Released on 2016-04-23

0.3.2 (2016-04-22) - Tweaks.

  • Added collider setting for procedural fairing base.

  • Adjusted tech node to play more nicely with Real Scale Boosters.

Download (10.35 MiB)

Version 0.3.1 for Kerbal Space Program 1.1

Released on 2016-04-03

0.3.1 (2016-04-03) - KSP 1.1 Hotfix

  • Sample rockets were locking up KSP 1.1 when sending to the pad/runway. Updated for 1.1, but are no longer compatible with 1.0.5.

  • Sample rockets saved with fairing settings to use maximum ejection force, and 4-way clamshells.

Download (10.35 MiB)

Version 0.3 for Kerbal Space Program 1.1

Released on 2016-04-03

0.3 (2016-04-02) - The Sea-Recovery Update. Works with KSP 1.0.5 and 1.1

  • Increased crash tolerance of first stage engine and tank to 150 m/s to support oceanic crash-landing recovery.

  • Removed stack attachment node from end of skirt extension on second stage tank, and instead added it to second stage engine.

  • Added inflatable "recovery flare" to the first stage engine, and updated sample rockets to put it on action group 2.

Download (10.35 MiB)

Version 0.2 for Kerbal Space Program 1.1

Released on 2016-03-28

0.2 (2016-03-28) - The Sea-Launch Update. Works with KSP 1.0.5 and 1.1

  • Increased crash tolerance considerably on all parts, to allow bouncing around in the water.

  • Added attachment node at bottom of first stage engine to allow attaching the ballast tank.

  • Extended first stage tank's lower skirt, and removed extraneous attachment node corresponding to it.

  • Shortened first stage engine length (and updated sample rocket accordingly), after discovering miscalculation.

  • Reworked colliders for first and second stage main engines, and first stage tank.

  • Added ballast tank for sea launches.

  • Added SPH sample rocket with ballast tank.

  • Updated VAB sample rocket to ignite the verniers at launch in the staging.

  • Added an animated bell extension for the second stage engine, and updated sample rockets to use it (action group 1).

  • Added custom smoke trail for first stage engine (known issue: runs regardless of air pressure).

  • Removed smoke trails from upper-stage engine + verniers (hydrogen burns cleanly).

Download (9.26 MiB)

Version 0.1 for Kerbal Space Program 1.0.5

Released on 2016-03-25

0.1 (2016-03-25) - First test release.

  • Mostly complete. Using stock procedural fairing system. No ballast tanks.

  • Known issue: Fairing "confetti" is rather deadly.

  • Known issue: Steering authority in upper stage is weak. Already artificially inflated though! (should be worse!)

Download (7.83 MiB)

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