The Fregat-Hydro was designed to comply with the Fédération Aéronautique Internationale microlight category. It features a cable-braced hang glider-style high-wing, weight-shift controls, a two-seats-in-tandem open cockpit, twin inflatable floats and a single engine in pusher configuration.
The Fregat-Hydro is made from bolted-together aluminum tubing, with its double surface wing covered in Dacron sailcloth. Its 9.281NaN1 span wing is supported by a single tube-type kingpost and uses an "A" frame weight-shift control bar. On the more recent models the powerplant is a modified liquid-cooled, four-stroke, 800NaN0 Suzuki automotive engine. The aircraft has an empty weight of 2300NaN0 and a gross weight of 5000NaN0, giving a useful load of 2700NaN0. With full fuel of the payload is 2460NaN0.