In this video I put the TaG Submarine Ballpoint through the kind of real-world check I wish more “tactical” pens got: design, mechanism, and whether it actually feels good to write with. It’s a machined aluminum pen with an anodised finish, a fluted barrel, and the headline feature is that turbine-style mechanism. I also look at the matching sonar wave-inspired desk stand made from LETO, because this set is clearly trying to be both an EDC pen and a proper desk pen. For the writing side, the Submarine uses a Schmidt 909 hybrid ballpoint refill (Parker-style), and I focus on what that means in practice—how it behaves on the page, how consistent it feels, and whether the experience matches the price and hype. I’ll also own a quick correction: I accidentally call it a “rollerball” a few times in the video—it’s a ballpoint. My takeaway is simple: if you’re eyeing the Kickstarter, this is one of those projects where the machining and mechanism are the point, and the refill choice is a solid, sensible match for everyday writing. If you’re here for fountain pens, I also have a Submarine Fountain Pen video linked so you can compare the concept across both formats.