The last day of February saw the hull and superstructure of Heesen YN 17255, a.k.a. Azamanta, joined. The megayacht marks the first steel 180-foot (55-meter) Fast Displacement project for the yard. She’s also the fourth to feature the Fast Displacement Hull Form (FDHF) created by Van Oossanen Naval Architects.
Heesen YN 17255 is about a year away from sea trials. However, Perry van Oossanen of the naval architecture team predicts she’ll see 15 knots under just half power. Heesen says she’ll also see a 16½-knot top end. It further states she’ll achieve a 4,500-nautical-mile range at 13 knots. It’s all due to the FDHF.
You may recall that Van Oossanen Naval Architects presented the FDHF concept at a marine trade show in 2009. Heesen was the first yacht builder to sign on to use it. It’s more slender than the typical round-bilge, hard-chine hull that most megayachts employ. Tank tests further show it kicks up smaller wakes, has good seakeeping abilities, and requires less fuel consumption throughout the speed range. The latter is key. Perry van Oossanen explains, “The typical load profile of a motor yacht often consists of long-range cruising at low speeds and only short periods of time at higher and maximum speeds. This indicates the need to focus hull design over the entire speed range rather than on maximum speed only. The FDHF incorporates design features that have a large effect on hydrodynamic resistance over the whole speed range, such as the area of the immersed transom, bulbous bow, trim control and spray rails.”
Heesen YN 17255 will treat her owners and guests to more than just performance. A forward garage with gull-wing doors will house tenders and toys. This allows a dedicated beach club and gym in the transom. The megayacht will additionally have accommodations for 10 guests plus the owners. Special friends or family will get the full-beam VIP stateroom. The owners, of course, get a main-deck suite with a private 753-square-foot (70-square-meter) alfresco area. Sinot Exclusive Yacht Design is overseeing the interior.
The video below is a time-lapse look at how the hull and superstructure came together.