55m Steel FDHF

Design

Designer

Omega Architects

Interior designer

Luca Dini Design & Architecture

Summary

Best Suited For

• Bluewater Cruising

  From the published figures: range 4500 nm

Tags are derived from certified class, length, sail area, accommodation and tankage using the criteria described on the Sources page; an editor may add or remove one.

Speed, Power & Tanks

What the builder publishes about how fast, how strong and how much the boat carries.

Dimensions

LOA

180.4 ft (55 m)

Hull length

—

LWL

—

Beam

31.5 ft (9.6 m)

Draft (min)

9.4 ft (2.85 m)

Draft (max)

—

Air draft

—

Displacement

—

Ballast

—

Cabins

6

Heads

—

Berths

—

Performance

Maximum speed

15.5 kn

Cruising speed

—

Range

4500 nm

Guests

12

Crew

13

Engine and Tanks

Engine

—

Engine count

2

Engine manufacturer

MTU

Propulsion type

—

Fuel capacity

26,417 gal (100,000 L)

Fresh water capacity

6,340 gal (24,000 L)

Black water capacity

—

Construction

Hull material

Steel

Deck material

—

Rudder type

—

Steering wheels

—

Builder's Own Figures

Maximum power

2 x 1000kW (printed in kW only)

Draught

2.85 m at half load

Hulls in this Series

Project Diana, Moskito (2021), MY Reliance (2023), Serena (2024), Iris Blue (2024), Solemates (2025), Agnetha (2025), Pa’lante (2026)

Bow thruster

zF-Marine 125kW, electrically driven

Crew

13 crew in 7 cabins

Gross tonnage

760 GT

Main engines

2 x MTU 8V 4000 M63 (IMO tier III)

Hull type

FDHF (Fast Displacement Hull Form)

Main generators

2 x Zenoro, each 175kW, 50 hertz, 1 x Zenoro emergency gen 80kW, 50 hertz

Maximum speed

15.5 knots, at half load

Range

4,500 nm at 12 knots

Figures for

YN 21455 Project Diana (delivery Q2 2027); the platform has no page of its own

Stabilisers

naiad Dynamics, 2 fins, type 720, zero speed

Layouts & Drawings

4 drawings from the builder's page: general arrangement, sail plan, profile.

• 

  21455-Diana-COLOURED-SD-17-02-2026-HR — Heesen Yachts

• 

  21455-Diana-COLOURED-BD-17-02-2026-HR — Heesen Yachts

• 

  21455-Diana-COLOURED-MD-17-02-2026-HR — Heesen Yachts

• 

  21455-Diana-COLOURED-LD-17-02-2026-HR — Heesen Yachts

About Heesen Yachts

Semi-custom

Dutch superyacht yard at Oss, founded by Frans Heesen in 1978, building aluminium and steel motor yachts entirely in-house — five semi-custom Heesen Series platforms from 50 to 57 metres, built on speculation for short delivery, alongside Smart Custom and Full Custom yachts.

In 1978 the entrepreneur Frans Heesen took over an existing shipyard in Oss harbour and began producing aluminium Striker boats. A year later the 20-metre Amigo was launched, the first yacht to bear the Heesen name, and Heesen Shipyards was born. The 38-metre Octopussy of 1988, at over 50 knots the fastest luxury yacht in the world, was the yard's worldwide breakthrough. In 1992 the 50-metre Achiever, built for long voyages, became the first of many steel displacement yachts, and in 1996 Obsessions was, when launched, the largest and most powerful sport fisherman in the world. An expansion in 2008 raised capacity to up to eight yachts a year. Galactica Star (2013, 65 m) was Heesen's first fast displacement yacht, Alive (2014) the first yacht in the world to harness a Hull Vane, and the 70-metre Galactica Super Nova (2016) its largest yacht so far, the year a new 85-metre dry dock opened. Home (2017) introduced a cleaner, quieter hybrid solution, and for its 40th anniversary in 2018 the yard announced the 80-metre Project Cosmos, with a top speed of 30 knots. On 7 April 2025 Heesen announced its full acquisition by the Dutch entrepreneur and investor Laurens Last.

The Heesen Yachts Range

Every model Heesen Yachts publishes, by length — where this one sits in the range.

1. 57m Aluminium FDHF186 ft
2. 55m Steel FDHF· this model180.4 ft
3. 50m Aluminium Semi-displacement164 ft
4. 50m Steel FDHF163.7 ft
5. 50m Aluminium FDHF163.4 ft

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