Brownie’s THIRD LUNG Sea Lion Powers Three Divers on Single 18-Pound Battery, Replacing Nine Scuba Tanks

Brownie’s THIRD LUNG has formally highlighted the operational capabilities of its Sea Lion 3-Hour Floating Hookah Diving System, bringing renewed attention to how a single, self-contained unit can support three simultaneous divers to 33 feet for more than three hours — all powered by an 18-pound battery. The announcement positions the system as a practical alternative to conventional scuba configurations for recreational diving, boat maintenance, and multi-diver excursions where portability and extended runtime are critical.

At the core of the Sea Lion’s performance is a 70Ah battery that delivers consistent power output throughout an extended dive session. A single Sea Lion unit running on that battery can sustain three divers simultaneously at depths up to 33 feet for more than three hours of continuous operation. When measured against conventional scuba, that runtime and diver capacity translates to the functional equivalent of roughly nine full scuba tank sets — a comparison that clarifies the operational efficiency the system offers for any multi-diver scenario. The battery itself weighs 18 pounds, which is a meaningful distinction for boat owners and marine professionals who already manage significant gear loads. Traditional scuba configurations require individual tanks, regulators, and buoyancy equipment for each diver. The Sea Lion consolidates air supply into one floating unit, reducing the equipment footprint substantially while extending the time divers can remain productive underwater.

The Sea Lion was designed with a specific operational profile in mind: users who need reliable, repeatable underwater access without the logistics of full scuba gear management. Lobster diving and fun with the family are among the most common use cases, where friends may plan to spend the entire day on the water diving from their boat. Because the system floats at the surface and delivers air through hoses to divers below, there is no requirement for each diver to carry a pressurized cylinder, except for the recommended Spare Air backup bottle. The floating air source also provides visibility and flotation at the surface throughout the dive. Diving from shore with a Brownie’s tankless dive system is common as well, and users report enjoying that they can handle just one piece of gear rather than several sets of scuba gear.

The 18-pound battery weight is a deliberate engineering outcome, not simply a specification. At that weight, the battery remains manageable for transport between vessels, docks, and storage facilities without requiring mechanical assistance. Competing surface-supplied systems that rely on gasoline-powered compressors introduce fuel storage requirements, noise output, and exhaust considerations that make them unsuitable for enclosed marina environments or noise-sensitive anchorages. The Sea Lion’s battery powered architecture eliminates those constraints. The system operates quietly, produces no exhaust, and can be recharged from standard shore power or onboard electrical systems. For yacht owners who conduct regular bottom cleaning between haul-outs, the ability to deploy three divers simultaneously from a single compact unit represents a direct reduction in the time and cost associated with each maintenance cycle.

Surface supplied air diving systems provide breathing air from equipment located at the surface rather than from tanks carried by the diver, making them popular for applications such as hull cleaning, underwater inspections, marine maintenance, and recreational diving. Brownie’s THIRD LUNG has been manufacturing surface supplied air diving systems for decades and now features a product line that includes battery powered, gasoline, and AC electric configurations. The Sea Lion sits within the company’s battery powered category and reflects the manufacturer’s focus on extending dive time and diver count without increasing system weight or complexity. The hookah dive system category — where air is supplied from the surface through hoses rather than from tanks carried by individual divers — has historically served commercial diving, aquaculture, and marine inspection markets. Brownie’s THIRD LUNG has developed the Sea Lion to bring that same operational model to recreational boat owners, charter operators, and independent marine maintenance professionals who require a dependable, high-capacity system in a format suited to smaller vessels and frequent transport.

The Sea Lion combines a 70Ah battery platform with support for up to three divers from a single floating unit, providing extended runtime in a compact package designed for recreational and marine maintenance applications. More information is available at Brownie’s THIRD LUNG.

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