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Seahawk 48
Designer: Stan Huntingford  ·  Builder: Seahawk (Usa)  ·  First built: 1976
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About the Seahawk 48

Built by Seahawk USA starting in 1976, this substantial 48-footer represents classic American cruising yacht design from the era when offshore comfort and seaworthiness took precedence over racing performance. Designer Stan Huntingford created a vessel that embodies traditional sailing virtues with its long keel configuration and masthead ketch rig, making it an appealing choice for serious cruisers seeking a dependable offshore platform. The boat's generous displacement of 52,000 pounds and impressive comfort ratio of 58.75 signal its intended purpose as a long-distance cruiser capable of handling challenging conditions with stability and predictable motion. The masthead ketch rig provides excellent sail handling options for short-handed crews, while the 6.75-foot draft offers reasonable access to harbors while maintaining directional stability in heavy weather. With a capsize screening formula of 1.48, this design falls well within accepted parameters for offshore sailing, and the long keel hull type contributes to excellent tracking and self-steering characteristics highly valued by cruising sailors. The fiberglass construction ensures durability and lower maintenance compared to wooden alternatives of the era. While not built for speed, the theoretical hull speed of 8.37 knots provides respectable passage-making capability for coastal and offshore cruising adventures.

Core Dimensions
LOA (Length Overall) 48.00 ft / 14.63 m
LWL (Waterline Length) 39.00 ft / 11.89 m
Beam 13.75 ft / 4.19 m
Max Draft 6.75 ft / 2.06 m
Displacement 52,000.00 lb / 23,587 kg
Ballast 10,000.00 lb / 4,536 kg
Design & Construction
Hull Type Long Keel
Rigging Type Masthead Ketch
Construction FG
Designer Stan Huntingford
Builder Seahawk (USA)
First Built 1976
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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
19.23
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
391.35
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
58.75
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
1.48
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 8.37 kn
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. 1,916.08 pounds/inch
How It Compares

vs. Christina 48 Hans Christian, Clipper 48 Ketch Cheoy Lee, Hughes 48

This boat Similar boats
Dimensions
LOA
Seahawk 48 ★
48.0 ft
Christina 48 Hans Christian
47.9 ft
Clipper 48 Ketch Cheoy Lee
47.9 ft
Hughes 48
48.0 ft
LWL
Seahawk 48 ★
39.0 ft
Christina 48 Hans Christian
40.3 ft
Clipper 48 Ketch Cheoy Lee
34.0 ft
Hughes 48
33.0 ft
Beam
Seahawk 48 ★
13.8 ft
Christina 48 Hans Christian
13.5 ft
Clipper 48 Ketch Cheoy Lee
13.0 ft
Hughes 48
11.8 ft
Displacement
Seahawk 48 ★
52 lbs
Christina 48 Hans Christian
29 lbs
Clipper 48 Ketch Cheoy Lee
31 lbs
Hughes 48
30 lbs
Ballast
Seahawk 48 ★
10 lbs
Christina 48 Hans Christian
11 lbs
Clipper 48 Ketch Cheoy Lee
13 lbs
Hughes 48
15 lbs
Sail Area
Seahawk 48 ★
Christina 48 Hans Christian
960 sq ft
Clipper 48 Ketch Cheoy Lee
1 sq ft
Hughes 48
Performance
SA / Displacement (higher = more powerful)
Seahawk 48 ★
Christina 48 Hans Christian
16.0
Clipper 48 Ketch Cheoy Lee
19.2
Hughes 48
Ballast / Disp (higher = stiffer)
Seahawk 48 ★
19.2 %
Christina 48 Hans Christian
Clipper 48 Ketch Cheoy Lee
Hughes 48
52.3 %
Comfort Ratio (higher = more comfortable offshore)
Seahawk 48 ★
58.8
Christina 48 Hans Christian
33.9
Clipper 48 Ketch Cheoy Lee
41.2
Hughes 48
Capsize Screening (lower = safer)
Seahawk 48 ★
1.48
Christina 48 Hans Christian
1.74
Clipper 48 Ketch Cheoy Lee
1.66
Hughes 48
Displacement / Length (lower = lighter)
Seahawk 48 ★
391
Christina 48 Hans Christian
Clipper 48 Ketch Cheoy Lee
Hughes 48
372
Hull Speed
Seahawk 48 ★
8.4 kts
Christina 48 Hans Christian
8.5 kts
Clipper 48 Ketch Cheoy Lee
7.8 kts
Hughes 48
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