The Heesen 55m Steel is a full-displacement steel superyacht built for long-range cruising in comfort. At 55 metres with a steel hull and aluminium superstructure, she combines ocean-crossing range with generous interior volume and the timeless Heesen profile.
Exterior lines by Omega Architects are defined by expansive tinted glass and a clean horizontal sweep across the decks. Inside, the interior by Bannenberg & Rowell is elegant and restrained, arranged around a full-beam owner’s stateroom on the main deck. She accommodates 12 guests across six staterooms, with quarters for a crew of 13.
Two MTU 8V 4000 M63 engines give a top speed of 15.5 knots and a comfortable 13-knot cruise, while 100,000 litres of fuel deliver a range of 4,500 nautical miles. Notable hulls in the class include Moskito, Reliance, Iris Blue, Solemates and Agnetha, each finished to its owner’s brief on the same proven platform.
Length
55M
Beam
9.6M
Draft
2.9M
Volume
760GT
Day Guests
12
Sleeping
12
Cabin
6
Crew
13
Cruise Speed
13KT
Max Speed
15.5KT
Fuel
100000L
Range
4500NM
Engine
2 x MTU 8V 4000 M63
Naval
Heesen / Van Oossanen
Exterior
Omega Architects
Interior
Bannenberg & Rowell Design
The 55m Steel measures success in nautical miles, not knots.
A full displacement steel hull, developed with Van Oossanen Naval Architects, trades outright speed for efficiency and sea keeping over distance. Twin MTU 8V 4000 M63 engines give a cruising speed of 13 knots and a top speed of 15.5, figures that matter less than the 100,000 litres of fuel she carries, enough for a genuine 4,500 nautical mile range. That is sufficient to cross the Atlantic without a fuel stop, and to cruise for a full season without returning to the same marina twice. It is a different kind of performance to a planing hull’s, measured in autonomy and comfort at sea rather than a top speed figure on a brochure.
Omega Architects drew a yacht that reads calm from any angle.
Long runs of tinted glass and a clean horizontal sweep across the decks give the 55m Steel a profile that avoids excess without losing presence, a houseline consistency Heesen has carried across the wider Steel range. The sun deck, close to 100 square metres, carries a Jacuzzi, al fresco dining and a hardtop for shade, while the wheelhouse deck below opens into a full beam sky lounge behind floor to ceiling glazing and retracting doors. Rather than an enclosed tender garage up front, the foredeck keeps an open tender bay, a decision that frees up space aft for a larger beach club at the water’s edge.
An 82 square metre owner’s apartment sets the tone for everything else.
Bannenberg & Rowell’s interior is restrained rather than showy, built around a full beam owner’s apartment forward on the main deck. Below, four further guest suites, split between double and twin configurations, join a VIP cabin to bring total accommodation to twelve guests across six en suite cabins. Nine guest bathrooms and three day heads keep circulation easy even with the yacht full, and a crew of up to thirteen, housed in seven cabins, keeps service seamless on passages that can run for weeks rather than days.
The beach club does the work a tender garage usually cannot.
With the tender kept in an open bay on the foredeck rather than an enclosed garage, the stern is free for a full beach club built around a large fixed swim platform, complete with gym and wellness space at the waterline. Inside, the full beam sky lounge on the wheelhouse deck opens through retracting glass doors onto its own seating and dining area, blurring the line between indoor comfort and open air living. Combined with the sun deck above, the 55m Steel offers a genuine spread of social spaces across her decks rather than a single showpiece room.
Heesen built the 55m Steel to be the flagship of her range, and the awards followed.
Delivered between 2013 and 2023 before handing over to a Mk2 version, she was shortlisted at the Boat International Design and Innovation Awards in 2018, 2020 and 2021 for her interior, and at the World Yachts Trophies in 2019 for her layout, with further nominations at the World Superyacht Awards running from 2020 to 2024. Heesen and Van Oossanen handled the naval architecture, Omega Architects the exterior and Bannenberg & Rowell the interior, the same team responsible for a yacht that has rarely been out of awards contention since launch. For a buyer weighing long range steel yachts in the 50 to 55 metre bracket, the track record speaks for itself.
Length
55M
Beam
9.6M
Draft
2.9M
Guests
12
Cabins
6
Cruise Speed
13Kt
Max Speed
15.5Kt
Length
60M
Beam
10.9M
Draft
3M
Guests
12
Cabins
6
Cruise Speed
13Kt
Max Speed
17.5Kt
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