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The GBM Rebreather – Houston’s Expedition & Travel Choice

From Air Diluent to Normoxic Trimix: Master the GBM at Gulf Coast Scuba

The GBM (Generic Breathing Machine) is a specialized, chest-mounted mechanical CCR (mCCR) built for the diver who demands a rugged, streamlined life-support system. It is one of the most portable technical rebreathers in the world, yet it is fully capable of the most demanding deep dives.

At Gulf Coast Scuba, we are Houston’s authority on the GBM platform. We provide a complete IANTD training curriculum, taking you from your first Air Diluent breath all the way to Normoxic Trimix exploration at 200 feet.

The GBM Advantage: Why Choose a Chest-Mount mCCR?

  • Total Mechanical Control: The GBM uses a high-precision Swagelok needle valve. This allows you to "fly the needle" and manually control your PO​2 with extreme accuracy, making it a favorite for technical divers who prefer mechanical reliability over electronic solenoids.

  • The Ultimate Travel Unit: At just 15.4 lbs (7 kg), the GBM is designed for the traveling explorer. It fits into a standard carry-on, allowing you to fly across the globe with your primary life-support system in hand.

  • Streamlined Expedition Profile: Because the GBM is worn on the chest, your back and sides stay clear. This makes it the premier choice for technical sidemount and tight cave restrictions where back-mounted units are too bulky.

  • Versatile Configuration: The GBM can be used as a standalone primary unit or as a "bailout" rebreather for extreme deep dives.

Your GBM Training Path in Houston

We offer the IANTD GBM Air Diluent: Learn the art of manual oxygen addition and master the buoyancy of a front-mounted unit.

 

 

  • Q: Can the GBM be used for deep Trimix diving?

    • A: Yes. At Gulf Coast Scuba, we certify divers on the GBM up to IANTD Normoxic Trimix, allowing for clear-headed exploration down to 200 feet (60 meters).

  • Q: Is the GBM a primary or bailout rebreather?

    • A: It can be both. While many use it as a bailout rebreather (BOB), it is a highly capable primary unit, especially for travel and sidemount-style technical diving.

  • Q: How much does a GBM weigh for travel?

    • A: The unit itself weighs approximately 15.4 lbs (7 kg), making it one of the most travel-friendly technical rebreathers on the market today.

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