Cyclops vs Seatruck: Ultimate Submersible Comparison for Subnautica 2

Introduction to the Two Mobile Bases

The Cyclops and the Seatruck represent two philosophies of mobile base design in Subnautica 2. The Cyclops is a massive, self-contained submarine that functions as a floating headquarters, while the Seatruck is a modular cab-and-trailer system that you customize module by module. Choosing between them changes how you explore, store loot, and survive the deep ocean.

Core Specifications

Modularity and Customization

The Seatruck's defining feature is its modular trailer system. You start with a bare cab and bolt on segments: storage, fabricator, aquarium, sleeper, teleporter, and docking modules. This lets you tailor the vehicle to the mission. A mining run might use cab + storage + dock, while a long expedition adds sleeper and fabricator. The Cyclops has no modular attachments; instead it offers fixed interior space where you build habitat pieces (fabricators, lockers, growbeds) just like a static base.

• Seatruck advantage: swap modules at a moonpool between trips.
• Cyclops advantage: larger free-build interior, no per-module speed penalty.

Speed and Maneuverability

The Seatruck cab alone is faster and more agile than the Cyclops, easily weaving through tight cave systems. However, every trailer you add increases drag and reduces top speed. A fully loaded Seatruck can feel sluggish. The Cyclops maintains consistent speed regardless of interior load, but its bulk makes it impossible to navigate narrow passages. If your routes involve tight tunnels, the Seatruck wins; if you travel open water, the Cyclops is smoother.

Power and Endurance

The Cyclops runs on six power cells and can be fitted with an engine efficiency module and a thermal reactor module that recharges cells near heat sources. This gives it exceptional endurance on long deep runs. The Seatruck cab has a single power cell that drains faster under load, especially with multiple modules attached. Plan to carry spare cells or build a charger module for extended Seatruck trips.

Deep Exploration Capability

The Cyclops reaches 1500 m with the depth MK3 upgrade and serves as a forward operating base for Prawn Suit dives into the lava zones. The Seatruck maxes out around 1000 m, which covers most mid-game content but falls short of the deepest biomes. For endgame Kyanite and Ion Cube farming, the Cyclops plus a docked Prawn Suit is the strongest combination.

Which Should You Choose?

Choose the Seatruck if you value flexibility, speed with light loads, and the ability to reconfigure for each mission. Choose the Cyclops if you want a true mobile headquarters with maximum depth, docked vehicle support, and the endurance for multi-day deep-sea operations. Many players build the Seatruck first and graduate to the Cyclops once they can afford the materials.