The interior design was a collaborative effort of Yacht Interiors by Shelley, who have worked with Hargrave on a number of yachts, and Sandy Sorenson. The interior arrangement, the exterior styling, and the naval architecture are by Hargrave's in-house team, and their talents show in little details that may pass without notice unless you're watching for them. For instance, the central stairway that runs from the belowdecks guest accommodations through the maindeck foyer to the upper-level skylounge is a compact design that takes little away from the generous, but still finite, space available on a yacht of this size. To conserve space and volume, the staircase is close to being a spiral, but without the drawbacks of that classic feature. The stairway aboard Sandrine, called a "winder," has a small hollow central core that allows a few more inches of tread for your feet as you climb, making it both safer and more comfortable than a spiral. It's a small distinction, but an important one when you're descending the stairs with the yacht rolling in a beam sea.