Serious Space

The 147-foot Sunrise Atomic has interior volume that sets her apart.

Atomic is a 147-foot Sunrise Yachts build.Courtesy Sunrise Yachts

Merle Wood & Associates just announced a joint listing with Thompson, Westwood and White for the sale of the 147-foot Sunrise Atomic, which, according to Merle Wood, "has the greatest volume of any yacht under 500 gross tons."

Atomic is a 2014 build with a hull constructed in high-tensile steel. The yacht has had one owner, who kept her exclusively for private use. Five staterooms accommodate as many as 11 guests, with interior décor by Darnet Design in France.

Several unusual spaces aboard Atomic include a technical tunnel that runs from her engine room to the bow thruster, a galley with oversized windows and an onboard dive center.

Atomic is lying in the Caribbean. She is expected to be on display and open for tours at the Fort Lauderdale International Boat Show this November.

Asking price: $18.9 million