Motor yacht · Royal Huisman · 2021

Phi

Reportedly owned by Sergei Naumenko. 58.5 metres — 192 feet — on the water.

Dark · North Sea58.5 m · 192 ft499 GT$50M est. value

On fileThe specification

Length

58.5 m · 192 ft

Beam

9 m · 30 ft

Gross tonnage

499

Builder

Royal Huisman

Year

2021

Flag

Malta

Type

Motor

Home port

Valletta

Guests

—

Cruise speed

—

Est. value

$50M

IMO

9867748

MMSI

229359000

Call sign

9HA5476

PhotographyThe vessel

4 photographs from public sightings via MarineTraffic. Click any frame to view it full size.

Where she wasLast position

StatusDark

WatersNorth Sea

Coordinates51.501° N, 0.012° W

Speed0 kn

Heading98°

Reported27 Jul 2026 · 19:25 UTC

A single AIS fix, not a live stream. Transponders are switched off routinely and lawfully in port.

Open the full map →

From the register

Detained Canary Wharf, London 28–29 Mar 2022 (first-ever UK yacht detention); High Court upheld detention Jul 2023; Court of Appeal upheld Feb 2024; UK Supreme Court dismissed owner appeal 29 Jul 2025; ECHR application pending (as of early 2026); still at Canary Wharf, deteriorating, no maintenance budget

Ownership

Reportedly owned by Sergei Naumenko

Phi is the only hull we have matched to Sergei Naumenko.

View the Sergei Naumenko file →

Specification and photography compiled from public maritime databases and open sightings. Position last reported 27 Jul 2026. Ownership is reported, not certified — see the method.