Starfield gives different classes of ships for players to pilot: A, B, and C. Any player can pilot a Class A ship, with them being the weaker and more basic ships. As players upgrade their piloting skills, they'll later be able to fly Class B or C ships, with Class C ships being the biggest and best there are.
Starfield: Where To Get The Abyss Trekker
The Abyss Trekker is a powerful Class C ship players can fly in Starfield; here's where to get it.
