The Seahorse mini-submarine is specially designed for: * Recreational and commercial underwater explorations for anyone in shallow waters * Low cost maintenance and easy operation * Minimum pilot training requirement. * Affordable price * Attractive design * Dry inside cabin * Excellent viewing and comfortable interior The Seahorse is a mini-submarine that can be operated after only a few hours of training, it is not a "wet" or a "semi dry" submersibles, it is watertight with a "dry" cabin where passengers can enjoy underwater tours without getting wet. Its "aircraft / spaceship" look and a bright yellow will catch all attention, draw inquiries and develop great interest. It can be launched from any boat ramp and even from a beach. Hi pressure steel tanks feed the air system, no need of pure oxygen refills or special scrubber chemicals. Passengers breath air inside the cabin normally with no need to wear any kind of gear. The cabin environment is attractive, dry and comfortable with no claustrophobic effect. For private use Pilots must be scuba diver certified and for commercial operation must have a USCG "Captain License" . There is no requirement nor certifications for the passengers. PRINCIPLE: The Seahorse is a dry ambient pressure submersible, an automatic pressurization system permanently equalizes the pressure inside the cabin with the outboard water pressure. Therefore the hull nor the cockpit have to resist to a differential pressure of the water, with this design no certified pressure hull is required because there is no risk of the hull collapsing. This is why a Seahorse can be purchased for 1/5th the cost of a one atmosphere submarine. Passengers breath fresh air inside the cabin with no need to wear or use any kind of scuba equipment. An adjustable flow of fresh air is forced into the cabin and the used air with carbon dioxide is dumped outboard keeping the inside with normal rates of oxygen. The fresh air flow rate is 3 times the volume of air inhaled by the passengers. Breathing air under pressure , operating a Seahorse follows the same scuba diving tables, at the difference that passengers are at rest and in a dry environment. To make the dives easy and safe a dive computer indicates the pilot all necessary parameters, depth, bottom time, time to surface. Ballasts arrangement and hull architecture provide high stability with impossibility to flip over. Air pressure is used to blow the ballast to surface the submarine. To reduce air consumption, to have an alternate source of air and to be able to dive right below the surface at periscope depth in snorkeling mode, a snorkel with a compressor feeds the cockpit with fresh air from outside instead from the tanks. Buoyancy is set by a buoyancy tank and controlled with a thumb switch on the control grip, buoyancy can be adjusted to neutral and smooth ascents or descents can be performed like a fish does with its bladder, preventing the engines thrust from blowing away sand and sediments all around the sub when approaching the sea floor. At intermediate depths, the pilot uses an aircraft type control stick with steering cables to action engines, compensated dive plan and rudder. The dashboard displays all necessary parameters, depth, air and battery capacity, sonars, dive profile, buoyancy and a video screen. The optional gas or diesel engine allows fast surface and snorkel transits. A remote dive site can be reached without a tow or support boat and the range of the submarine is increased beyond all expectations. It also gives a reserve of power in case of strong current SAFETY: High safety standard features allow easy and safe operation for great underwater explorations. A video camera in the periscope and another one in the keel prevent from collisions with other watercrafts or with sharp reefs when surfacing or landing on the sea floor. A scanning sonar displays reefs and floating object up to 600 Ft range. In case of lost of control a single action releases 2 drop weights to create an immediate positive buoyancy for a safe return of the submarine to the surface. Multiple engines and rudder are able to maintain a heading in case of an engine malfunction or to compensate an unbalanced thrust. A thick hull to prevent puncture in case of collision. Batteries are heavy duty deep cycle gel type maintenance free, passenger environment free of any hazard source and battery outgasing. Tanks can be replaced under the water by a rescue diver if needed. Emergency inhalators in the cockpit provide alternate source of breathing. All compartments and cabin are pressurized, in case of a leak, air bubbles would come out first rather than water in. Automatic and manual overrides, in case of a component failure. The Air system is not dependent of the power source, no electric power is required to surface the submarine in case of emergency. Permanent display of power and air capacity Thanks to the ambient pressure design, in case of irreversible emergency it is always possible to escape the submarine under the water for a swim ascent to the surface. In such case the submarine could be recovered later, have cockpit and electrical equipment immediately washed with fresh water otherwise electronic devices should have to be replaced. With this design the Seahorse cannot have a life threatening situation, although escape is possible in the worst situation, safety features and back up systems allow safe return of the submarine to the surface with its passengers.