Surface-supplied air systems
Keep the air above and the adventure below. Brownie’s gives trained divers a simpler way to explore, work and play underwater—without scuba tanks crowding the deck.
Choose your platform
Start with how you want to power, carry and deploy your system. Every route delivers the same Brownie’s idea: breathing air stays at the surface while you explore below.
01
Original Gas
The classic floating Brownie’s—modernized into one straightforward gas-powered system with options for the crew you bring.
02
Rechargeable + Floating
Bring battery-powered freedom to the whole crew with variable-speed air, swappable power and no gasoline required.
03
Built Into Your Boat
Install the air system below deck and deploy the hose from the side or stern whenever something below is worth exploring.
At a glance
Still deciding? This is the simplest way to separate the three core Brownie’s systems.
Let us help you choose
Why Brownie’s
From a quick look at the prop to a full day chasing lobster, Brownie’s systems are designed to get off the boat, into the water and back aboard without turning the deck into a dive shop.
One system. More reasons to get wet.
Bring the crew and make the most of the season.
Inspect props, running gear, intakes and anchors.
Turn a stop on the water into a look below it.
Share the underwater world with trained family and friends.
Sea LiON · shore ready
Beyond the boat
Sea LiON is not tied to the marina. Charge the battery, bring the system to the shoreline and float the breathing-air supply at the surface while your crew explores below.
Sister brand: BLU3
Nomad and Nomad Mini pack single-diver, battery-powered air into remarkably compact systems. They’re made for center consoles, tenders, shore dives and anyone who puts ultra-portability first.
1969
The original Brownie’s
Brownie’s has been making surface-supplied air systems since 1969. The engines, batteries and boats have changed, but the idea has endured: keep the breathing air above so divers can move more freely below.
That history now runs through The OG, Sea LiON and BIAS—and through the parts, service and people who support Brownie’s owners long after the first dive.
Confidence starts before the dive
Equipment is only one part of a good dive plan. Brownie’s also connects owners with training, practical preparation and support close to home.
Shop floating systems
Included online training
Online training is included with a new Brownie’s system. Complete the coursework, then practice setup, communication and emergency skills in a controlled pool before taking the system into open water.
Explore online training
A network that knows Brownie’s
Authorized Brownie’s dealers help customers choose equipment, understand configurations and stay connected to service and support.
Find a Brownie’s dealerBeyond the air system
Our Spare Air and Egressor kits provide independent emergency air intended to help a trained diver reach the surface in an out-of-air situation. Always be prepared!
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A Brownie’s Marine Group company
Spare Air is another company in the Brownie’s Marine Group family. Its compact refillable breathing system can be worn with a Brownie’s cummerbelt as part of a properly planned emergency setup.
Backup air supplements training and planning. Every diver must remain prepared to make an emergency ascent.
Shop Spare Air for Brownie’s
USA distributor
Brownie’s is the United States distributor for Bright Weights. The flexible belt and coated 500g slug system makes it easy to spread weight around the hips and adjust the amount without unthreading the belt. It can also be worn with the Brownie’s basic tow belt when you are not using a drop-weight cummerbelt.
Be visible from every direction
One thing we noticed while diving with a Brownie’s is how visible the floating system and its large elevated dive flag are to nearby boats. We wanted snorkelers and scuba divers to have that same kind of unmistakable surface presence.
A traditional two-dimensional flag can become hard to see when it turns edge-on. 3DBUOY displays dive flags in multiple directions on a bright three-dimensional shape, helping boaters recognize that people are in the water.
Shop 3DBUOYOther ways to get the air you need
Tankless systems are our specialty, but they are not the only path. Brownie’s and our sister companies also support hose diving, onboard tank filling and commercial work.
Keep the scuba cylinder at the surface and run a breathing-air hose directly to the diver below.
Shop hose diving kitsVisit sister company LW Americas to explore the YachtPro series for filling cylinders aboard or at home.
Explore YachtProFind land-based, higher-output systems built for professional crews and demanding underwater work.
View commercial systemsReady when you are
Tell us how many people want to dive, where you plan to use the system and which power source works best. We’ll help you find the right tankless setup.
Main system comparison
Start with crew size, power and portability. Then go straight to the system that fits.
Gas · Floating
2–4 divers · Up to 65 ft by configuration
Explore The OGBattery · Floating
2–4 divers · 2–3+ hours per battery
Explore Sea LiON24V · Built-in
2–3 divers · Installed aboard
Explore BIASBattery · Ultra-portable
1 diver · 30 ft maximum depth
Explore NomadBattery · Smallest option
1 diver · 15 ft maximum depth
Explore Nomad MiniBrownie’s Marine Group
Brownie’s Third Lung is part of Brownie’s Marine Group, a publicly traded family of marine technology companies spanning tankless diving, portable dive systems, emergency air and high-pressure compressors.
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