When the Ozone Submarine first launched, the reaction from many pilots was predictable: “Ridiculous.” And to be fair, some still think that. These high-performance envelope harnesses definitely polarize opinion. Some believe they’re overly complex, potentially dangerous, or simply unnecessary.

Personally, this isn’t the kind of harness I’d usually choose. But considering the Submarine has become the most popular high-performance racing harness on the market, I felt there had to be a reason—and I wanted to find out for myself. This review covers the version 1.2 of the Submarine: the internal harness remains version 1, while the outer envelope (in this case, the red fairing) has been updated to version 1.2.

The Inside: What You’re Actually Flying With

The big difference with this harness is the envelope. From the outside, it looks like something mysterious is going on, but inside it's actually a pretty standard pod harness. There’s a normal seatboard, frame, and back support. What makes it special is the full aerodynamic fairing that wraps around it.

This extra envelope does make the harness more expensive, and more complex. In fact, you're basically buying two things in one: the harness itself and the full aerodynamic outer shell. They're separate components, attached together, and that means more setup, more fitting, more adjustments.

For example, to get the envelope tension right, there's a spacer in the nose cone that you may need to swap out depending on your body size. If it’s wrong, the envelope will kink or develop creases, which defeats the purpose aerodynamically.

On the Ground and In the Air

Once set up, it’s not actually as awkward on the ground as I expected. Launching feels fine, although the extra bulk and weight are noticeable. If the tail is flapping around in wind before takeoff, it can be a pain—so you need to learn how to manage it. Some pilots tuck it under their arm, others into the visor flap. I’ve found the visor trick works well for me.

In the air, it’s surprisingly comfortable. That fully reclined, supine position takes some getting used to—it’s like lying on a beach lounger. But once you "give in" to that posture, it becomes very relaxing. It also improves your aerodynamics and performance.

However, flying in that position also has trade-offs. If you’re not used to it, it can feel strange, especially in rough air. Some pilots worry that it increases the risk of twists in case of a collapse. That’s something to keep in mind—this isn’t a harness for casual pilots or acro flying.

Reserves, Storage, and Features

Setup definitely takes more time. Everything has to be fitted carefully.

The Submarine has two reserve compartments—one on each side—which is standard for this class of harness. The reserve compartments are well-integrated but small. You’ll probably need lightweight reserves to fit them. The deployment system is clean and functional, and I’d say it’s an improvement over older Ozone harnesses.

Storage space is decent but not generous. The rear pocket fits a glider backpack and essentials, and there are a few small side compartments. It’s not designed for vol-biv or hike-and-fly—it’s a racing harness, and the storage reflects that.

For competition or XC pilots who don’t carry much gear, it’s enough. But if you're carrying camera gear like me, you might find it a bit limited.

The instrument deck is well-positioned and nicely designed. Additional decks can be zipped on for extra space, which I found helpful.

The speed bar system is functional—a three-step asymmetric bar inspired by the Bullet Bar. . It’s functional and gets the job done. However, many pilots (myself included) find alternatives like the Bullet Bar itself more effective and comfortable. I’d consider this a functional but improvable aspect of the harness. Personally, I prefer the system on the Niviuk Drifter.

Performance and Practicality

So, what do you actually get in terms of performance?

The biggest gain is sink rate. You're reducing drag significantly, and that makes a difference—especially in weak, scratchy thermals. It doesn't necessarily give you more speed, but you’ll be more efficient at speed. Many say it's equivalent to stepping up a whole glider class, performance-wise.

That’s key: you could stay on your current glider and still see a meaningful performance boost. This is especially valuable for pilots flying high B or C gliders who want more without compromising safety by moving up a wing class.

Magnetic Zipper and Daily Use

The v1.2 envelope includes improvements over the original version: cleaner inflation, better shape retention, and easier handling. One major innovation is the magnetic zipper (introduced in the v1.4 version), originally seen on the Supair Alp. It simplifies the entry and exit process: a red zip closes the pod, and a black one opens it.

This system works well—if you’re only doing one flight. On sites where multiple flights are common, it’s trickier. I eventually figured out how to unzip mid-air, but not everyone will be comfortable with that. Ideally, you’d reset the zip before taking off each time

Performance and Target Audience

The Submarine is not just for competition pilots. While it’s obviously designed with racing in mind, I’ve found it offers real benefits even for recreational XC pilots. Especially if you’re flying a high-B or C glider and want more performance without stepping up a class, this harness can help you eke out that extra glide or stay up in marginal lift.

What surprised me most is how transferable that performance advantage is—even to casual flying on small hills. It’s not just a competition tool—it actually helps in everyday flying, especially when conditions are weak or scratchy.

Conclusion

The Ozone Submarine isn’t for everyone. It’s expensive, a bit heavy, and requires more effort to set up and adjust. There are compromises in comfort, ease of use, and landing logistics. But in return, you get what is arguably the highest-performing harness on the market today.

It delivers aerodynamic gains, improved sink rate, and a feeling of stability and smoothness in the air. Yes, it’s more faff—and I still prefer simpler pods for casual flying—but I’ve come to see it not as a gimmick, but as a natural evolution in harness design.

For pilots pushing their cross-country distances, or those who want to get the most out of their wing without upgrading to a hotter glider, this harness is absolutely worth considering. Just be prepared for a learning curve—and some setup time.

Final Thoughts

I started out skeptical, even dismissive. But after real-world testing, I’ve come around. The Submarine is here to stay—and for the right pilot, it offers a serious performance edge.

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