139ft FEADSHIP yacht SYNTHESIS 66 u2014 exterior
SYNTHESIS 66
Superyacht for Sale

SYNTHESIS 66 Specifications

Asking Price
€16,500,000 EUR
($19,451,813 USD EST.)
Asking Price
€16,500,000 EUR
($19,451,813 USD EST.)
Length Beam Draft
139' / 42.4m 26' / 7.9m 8' / 2.5m
Hull Speed
Steel 13 KTS
Length
139' / 42.4m
Beam
26' / 7.9m
Draft
8' / 2.5m
Hull
Steel
Speed
13 KTS
Builder Built / Refit Gross Tonnage
1982 / 2023
347
Builder
FEADSHIP
Built / Refit
1982 / 2023
Gross Tonnage
347
Guests Cabins Crew
10 5 9
Interior Designer Exterior Designer
Boutsen De Voogt
Guests
10
Cabins
5
Crew
9
Interior Designer
Boutsen
Exterior Designer
De Voogt

SYNTHESIS 66 — 139' Feadship Superyacht for Sale

SYNTHESIS 66 is a 139-foot (42.4m) Feadship built in 1982, a proud member of the Feadship Heritage Fleet with exterior lines by De Voogt and a fully reimagined interior by Boutsen Design of Monaco. Her steel hull, 347 GT, and 13-knot top speed reflect the classic long-range Feadship formula. She accommodates 10 guests across 5 staterooms, attended by a crew of 9.

Between 2020 and 2022, she underwent an extensive technical and cosmetic refit at Monaco Marine, and her owner has continued investing since. The exterior received new teak decks, a complete repaint, and modernized deck spaces suited to today's cruising lifestyle. Inside, Boutsen preserved the original woodwork that gives a classic Feadship its soul while updating everything around it for contemporary comfort. The result is increasingly rare: a heritage Feadship that feels current without feeling like a museum piece or a gutted-and-rebuilt compromise. For a buyer who understands what a De Voogt-drawn steel hull from this era actually represents and who values a yacht that has been kept in immaculate condition from her berth in Monaco, SYNTHESIS 66 is ready for private use or charter.

SYNTHESIS 66 is currently located in Monaco in Monaco, La Colle.

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