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Swan 38 Ss 1 Ton
Designer: Sparkman & Stephens  ·  Builder: Nautor  ·  First built: 1974
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About the Swan 38 Ss 1 Ton

Bearing the prestigious Swan name, the Swan 38 Ss 1 Ton is a product of Nautor's Swan, the legendary Finnish builder long celebrated for producing some of the finest bluewater performance sailboats in the world. Built to compete in the One Ton Cup class, this racer-cruiser sits within a distinguished lineage of Swan designs that earned their reputations on demanding offshore racecourses throughout the 1970s and beyond. Like other Swan one-tonners of its era, this boat was engineered to balance competitive racing performance with the build quality and seakeeping ability for which Swan became synonymous. The "Ss" designation suggests a variation within the 38-foot One Ton class, likely reflecting specific design refinements or construction differences tailored for particular racing conditions. Buyers can generally expect the hallmarks of any Swan of this period — exceptional Nautor craftsmanship, robust offshore capability, and a hull form optimized for the IOR rating rule that defined grand prix racing of the time. For a prospective buyer, the Swan 38 Ss represents an opportunity to own a piece of offshore racing history that remains genuinely capable as a performance cruiser today.

Core Dimensions
LOA (Length Overall) 38.25 ft / 11.66 m
LWL (Waterline Length) 28.71 ft / 8.75 m
Beam 11.55 ft / 3.52 m
Max Draft 6.30 ft / 1.92 m
Displacement 18,300.00 lb / 8,301 kg
Ballast 7,100.00 lb / 3,221 kg
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction FG
Designer Sparkman & Stephens
Builder Nautor
First Built 1974
Last Built 1979
Number Built 116
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Known Issues & What to Watch For

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Performance Ratios
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
38.8
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
345.23
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 7.11 pounds/inch
Rig Dimensions
I (Foretriangle Height) 14.80
J (Foretriangle Base) 15.81 ft / 4.82 m
P (Mainsail Luff) 640.00 ft² / 59.46 m²
E (Mainsail Foot) Bukh
Engine & Accommodations
Horsepower 20
How It Compares

vs. Baltic 38 Dp, Sigma 38 Ss, Yankee 38

This boat Similar boats
Dimensions
LOA
Swan 38 Ss 1 Ton ★
38.3 ft
Baltic 38 Dp
38.1 ft
Sigma 38 Ss
38.3 ft
Yankee 38
38.2 ft
LWL
Swan 38 Ss 1 Ton ★
28.7 ft
Baltic 38 Dp
31.5 ft
Sigma 38 Ss
27.5 ft
Yankee 38
28.8 ft
Beam
Swan 38 Ss 1 Ton ★
11.6 ft
Baltic 38 Dp
12.3 ft
Sigma 38 Ss
10.3 ft
Yankee 38
11.8 ft
Displacement
Swan 38 Ss 1 Ton ★
18 lbs
Baltic 38 Dp
14 lbs
Sigma 38 Ss
19 lbs
Yankee 38
16 lbs
Ballast
Swan 38 Ss 1 Ton ★
7 lbs
Baltic 38 Dp
6 lbs
Sigma 38 Ss
6 lbs
Yankee 38
7 lbs
Sail Area
Swan 38 Ss 1 Ton ★
Baltic 38 Dp
731 sq ft
Sigma 38 Ss
662 sq ft
Yankee 38
638 sq ft
Performance
PHRF Rating (lower = faster)
Swan 38 Ss 1 Ton ★
Baltic 38 Dp
96 s/nm
Sigma 38 Ss
Yankee 38
120 s/nm
SA / Displacement (higher = more powerful)
Swan 38 Ss 1 Ton ★
Baltic 38 Dp
19.9
Sigma 38 Ss
14.9
Yankee 38
16.1
Ballast / Disp (higher = stiffer)
Swan 38 Ss 1 Ton ★
38.8 %
Baltic 38 Dp
45.4 %
Sigma 38 Ss
Yankee 38
45.8 %
Comfort Ratio (higher = more comfortable offshore)
Swan 38 Ss 1 Ton ★
Baltic 38 Dp
23.3
Sigma 38 Ss
43.1
Yankee 38
29.4
Capsize Screening (lower = safer)
Swan 38 Ss 1 Ton ★
Baltic 38 Dp
2.03
Sigma 38 Ss
1.54
Yankee 38
1.87
Displacement / Length (lower = lighter)
Swan 38 Ss 1 Ton ★
345
Baltic 38 Dp
204
Sigma 38 Ss
Yankee 38
300
Hull Speed
Swan 38 Ss 1 Ton ★
Baltic 38 Dp
7.5 kts
Sigma 38 Ss
7.0 kts
Yankee 38
7.2 kts
Speed Number (higher = faster)
Swan 38 Ss 1 Ton ★
Baltic 38 Dp
3.0
Sigma 38 Ss
1.0
Yankee 38
1.7
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