Introduction
NauTec 2 is an ocean tech mod whose machines run on laser beams.
NauTec machines are powered by laser power (AP) fired as a beam from one block into another. Beams also carry a purity value, and better recipes need purer beams. Everything starts with prismarine, and most of the early materials come from the sea floor: ruins, buried geodes, crates and the parts left inside them.
Where to Start
- Collect prismarine. Dig
Prismarine Sand on beaches and ocean floors for Prismarine Shards and Prismarine Crystals. - Build an
Aquatic Catalyst and fire your first beam: Laser Power. - Drop Aquarine Steel Compound into that beam to make Aquarine Steel, the metal most recipes use: Item Transformation.
- Explore the ocean floor for Structures and Salvage, and make a Diving Suit so you can stay down long enough to loot them.
- Make Etching Acid to clean the rusted shut crates you find: Crates and Etching.
From there the guide splits into Laser Chemistry for fluids, tools and more beam blocks, Aquatic Biology for bacteria, Deep Engineering for high purity work, Laser Augmentation for body augments, and Naval for the Sea Scout and Wave Jet.

Prismarine Sand
A falling block like sand, scattered over beaches and ocean floors in every ocean. Digging it drops 2 to 4 Prismarine Shards, 2 to 4 Prismarine Crystals and a little experience. Fortune adds shards, and Silk Touch picks up the block instead.
It is the easiest early supply of Prismarine Shards and Prismarine Crystals, which the Aquatic Catalyst burns as fuel.
This Book
You get the NauTec 2 Guide the first time you join a world (turn this off with spawnBookInInventory in config/nautec-common.toml). Hold GuideMe's guide key while hovering a NauTec item to open its page.