Lady Hertha is a 26.2 m / 86′0″ luxury motor yacht. She was built by Yarrow in 1935.
With a beam of 5.3 m and a draft of 2.3 m, she has a steel hull and steel superstructure. This adds up to a gross tonnage of 86 tons.
She is powered by Gardner engines of 230 hp each giving her a maximum speed of 11 knots and a cruising speed of 9 knots. Lady Hertha's maximum range is estimated at 2700 nautical miles.
The motor yacht can accommodate 6 guests in 3 cabins with an interior design by Alain Tassin and an exterior design by G.L. Watson.