The Selene 66 is built on the same hull mould as the Selene 62, and the increase in length allows for significant expansion of living and operating spaces throughout the yacht. An extended cockpit adds 7-3/4 inches (19,7 cm) to the covered deck, making room for lounge chairs and the built-in settee while leaving plenty of room to access the rounded stairway leading up to the flybridge. With the overall increase in the LOA of the Selene 66, the living space of the saloon is 27 inches (68,6 cm) longer. The entire living and dining area is on the salon level and is entered into the cockpit. A spacious pilothouse includes a sky lounge behind the helm or a galley, so passengers or the cook have an outstanding view from the surrounding windows.
Owners will enjoy a superb three-stateroom layout with crew quarters aft of the engine room or a large technical compartment, and all staterooms have ensuite heads. The master stateroom has a vanity, full-length closets, and a writing desk. The flybridge can be accessed from the stairway in the cockpit or a stairway in the pilothouse. The flybridge is 37 inches (94 cm) longer than her 62-foot sister-ship, allowing for extended deck space that can accommodate a large tender and comfortable seating for eight. Machinery space was not neglected, and systems are easily accessed through a transom or side deck door. The engine room features full-standing headroom up to 6’2” (1,82 m). All major components are within reach for ease of maintenance. In addition, a massive lazarette has room for separate washer and dryer units stored under a workbench. The lazarette also includes a sink and freezer. As a seasoned owner and mariner commented: «The Selene 66 is a bastion of luxury doubling as a no-nonsense efficient and safe passage maker.