Proton is a 38.1 m / 125′0″ luxury motor yacht. She was built by Panteleakos in 1992.
With a beam of 7.88 m and a draft of 2.5 m, she has a steel hull and steel superstructure. This adds up to a gross tonnage of 338 tons.
She is powered by Cummins engines of 1880 hp each giving her a maximum speed of 15 knots and a cruising speed of 13 knots. Proton's maximum range is estimated at 3000 nautical miles.
The motor yacht can accommodate 12 guests in 6 cabins with an interior design by N. Papathomas and an exterior design by Pavratos.