The 22 Dauntless features a modified V-hull design.
The first arrived at the precinct two months after Yuki's disappearance, addressed to "Whoever is sitting at the desk that used to belong to Detective Sato." Since Ren had never actually left his desk, the letter found him easily enough. sp furo 22
The "SP" designation indicates the following technical process: : The hole is advanced using a percussion system. The 22 Dauntless features a modified V-hull design