The B130 update introduced several new mechanics and content additions to the early access version:
B130 arrives! · UBOAT update for 21 November 2021 - SteamDB UBOAT.B130.Early.Access.part1.rar
: New missions and narrative content focused on the final stages of World War II. The B130 update introduced several new mechanics and
: Significant improvements were made to the early-game tutorials to help new players learn the complex systems. UBOAT.B130.Early.Access.part1.rar