How do I install Unseaworthy?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does Unseaworthy work with?

The listing gives Minecraft 1.20.1, 1.21.1, 1.21. This is the version stated by the author or source site, not something we verified ourselves.

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Unseaworthy

Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.

by murphy_slaw · on CurseForge

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader Fabric3 builds
Mod loader NeoForge1 build
Mod loader Forge1 build

Minecraft version

Minecraft 1.21.1Newest
Minecraft 1.21
Minecraft 1.20.1

Minecraft 1.21.1Newest

Minecraft 1.20.1Newest

⬇ Download for 1.21.1 · Fabric ⬇ Download for 1.21 · Fabric ⬇ Download for 1.20.1 · Fabric ⬇ Download for 1.21.1 · NeoForge ⬇ Download for 1.20.1 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

Unseaworthy

This mod makes vanilla minecraft boats unseaworthy. They operate normally on rivers and near shorelines, but as soon as they enter an ocean biome, they begin to be tossed by the sea and eventually break apart.

Features

Boats deployed on water begin shaking and bouncing upon entering ocean biomes (any biome in the c:is_ocean biome tag).
You can optionally set a minimum water depth for boats to sink in tagged biomes.
A configurable number of ticks later, the boat is wrecked.
The % chance of being wrecked each interval is configurable.
Wrecked boats can be configured to:
- SINK: boat is pulled underwater and ejects passengers
- BREAK: boat is broken and drops its item entity
- DESTROY: boat is destroyed and drops a random number of planks and sticks
Optionally set a miniumum weather condition to sink boats. Defaults to CLEAR (i.e. always sink boats) but can be set to RAINING or THUNDERING.

Datapack Stuff

You can change which types of boat entities sink with the entity tag

unseaworthy/tags/entity_types/sinkable.json

On 1.21.1 it's

unseaworthy/tags/entity_type/sinkable.json

You can change which biomes cause boats to sink with the biome tag

unseaworthy/tags/worldgen/biome/sinks_boats.json

Why would you want that?

I needed a way to encourage players to build actual ships in a mod pack that is all about ocean voyages. Boats are too good, so I made them worse.

Acknowledgements

Graphics

Icon: "Bailout" by Luis Prado from Noun Project (CC BY 3.0)

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.20.1, 1.21.1, 1.21
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as unseaworthy-neoforge-1.21.1-1.4.0.jar — drop this file into the mods folder
Download size: 158 KB
Download link checked 27 Sept 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.20 Java mods for 1.21