The RX4 Patrol Ship served as a long-duration patrol craft for the Trianii Rangers within the expanse of Trianii Space. Reflecting the family-oriented culture of the Trianii Rangers, the interior design of these ships prioritized a comfortable, residential feel, setting them apart from typical military ships. While not designed for large-scale battles, it possessed sufficient firepower to effectively handle the petty criminals and buccaneers common in Trianii territory.