SeaBird claimed to be world’s fastest personal submarine – and it doesn’t even have a motor

Recreational submarines are a burgeoning market

If the amount of personal submarine stories crossing our desks in recent years is any indication, recreational submarines are a burgeoning market. While most personal submarines, such as U-boat Worx’s offerings, employ electric motors powered by a rechargeable battery pack, US-based company AquaVenture has taken a different approach to create what it says is the fastest personal submersible available. This is because the SeaBird doesn’t pack a propulsion system of its own, but is instead towed through the water by a surface vessel.

AquaVenture says the patent-pending tow system used on the SeaBird essentially delivers the power of an internal combustion engine to an underwater vessel. Pointing out that the fastest personal subs currently available are limited to speeds of less than 10 mph (16 km/h), the company says the SeaBird will be certified to travel at speeds of up to 22 knots (25 mph/40 km/h), both above and below the water’s surface.

The SeaBird can be towed on a cable of up to 400 ft (122 m) in length, which allows it to operate in a large cone behind the towing surface vessel. Up to two SeaBirds can be towed from the one surface vessel and AquaVenture says the vehicles can operate to depths of 150 ft (46 m) – however, this can be doubled to 300 ft (91 m) for “certain (non tourism) customers.” The SeaBird also provides a habitable atmosphere for 24-72 hours.

Controlled via a side-mounted joystick and rudder pedals, the SeaBird is guided by an electrically-actuated 6-hydroplane control system, which AquaVenture says allows it to perform rapid 360-degree rolls, and climb and dive steeper than most roller-coasters. The company also offers the option of a single center-mounted 3-axis control stick in place of the side-mounted joystick and rudder pedals. The electrical system is powered by 24-volt hot-swappable batteries that can swapped out in around five minutes.

The SeaBird’s pressure section is constructed from ABS certified steel, with the canopies made from ABS certified Plexiglass and the external faring or shell composed of composite materials – primarily fiberglass with Kevlar at the front for impact protection and in the lower portion of the shell for protection from sea-floor impacts. An energy absorbing crumple zone is designed to protect the sub’s pressurized section in the event of a collision, while its positive buoyancy means it will automatically surface if the towing vessel comes to a stop or is disconnected from the SeaBird.

The SeaBird also features a sonar system to display potential underwater hazards in cases of reduced visibility and offers optional extras including leather seats, headliner and trim, custom exterior paint job, wired telemetry system offering the ability to transmit video, GPS and other data in real time between the SeaBird and the surface, additional video monitors, upgraded lighting, and additional sensors, such as water temperature, salinity and sea-state.

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