Savannah

When Feadship delivered Savannah in 2015 she was a yacht of firsts. According to the yard, no superyacht before her ran on hybrid power. Propulsion comes from one diesel paired with generators, batteries and a steerable thruster, and the arrangement burns roughly 30% less fuel. On battery power she moves almost without a sound, which you notice most at dawn in a quiet anchorage. Her green paint is another milestone: no superyacht had been finished entirely in metallic before her, and Feadship developed its own spraying method so the colour could go on in a single sweep. CG Design, a studio with no previous yacht to its name, drew both the exterior and the interior, and Savannah collected five major awards in the year after her launch.

The room that guests talk about afterwards is the Nemo lounge. It sits partly below the waterline, with tiered seating facing a window onto the sea, so the show is fish and filtered light; when you want a film, a screen drops down instead. Above it, the main deck aft steps down towards the water and holds a 9-metre infinity pool, while a fireplace, a hammam and a treatment room cover the cooler evenings and slower afternoons.

The owner's suite faces forward, with a study and a private deck in front of it, and the VIP on the main deck has its own balcony. Families get a waterslide that starts from the upper deck; groups that like music late get a DJ booth on the sun deck. She is also wheelchair accessible, with a lift between decks.

The right party is one that cares how a yacht is made: design lovers, people interested in quieter, cleaner propulsion, and families who want something they have not seen before. She cruises the western Mediterranean in summer and the Caribbean in winter.

She is not for anyone who wants traditional wood panelling, nor for a group that needs fixed dates at short notice: she is only chartered occasionally, so availability is limited.