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Dione 98
Designer: Gary Mull  ·  Builder: Nautiber Sa (Esp)  ·  First built: 1970
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About the Dione 98

Designed by renowned naval architect Gary Mull and built by Spanish manufacturer Nautiber Sa starting in 1970, this 32-foot sailboat represents classic early 1970s cruising design philosophy. The moderate fin keel and spade rudder configuration provides responsive handling while maintaining directional stability, making it well-suited for coastal cruising and weekend sailing adventures. With a displacement of 6,834 pounds and nearly half that weight carried in ballast, the Dione 98 offers reassuring stability for extended passages. The masthead sloop rig carrying 394 square feet of sail area delivers respectable performance without being overpowering for a small crew. The boat's sail area to displacement ratio of 17.56 suggests moderate sailing performance that favors steady progress over outright speed. The comfortable 18.07 comfort ratio indicates this yacht prioritizes seaworthiness and motion comfort over racing performance, while the capsize screening formula of 2.17 falls within acceptable parameters for coastal and near-offshore sailing. Gary Mull's design expertise, evident in numerous successful racing and cruising boats throughout his career, shines through in the Dione 98's balanced proportions and practical layout. The fiberglass construction ensures durability and reasonable maintenance requirements for today's owners.

Core Dimensions
LOA (Length Overall) 31.99 ft / 9.75 m
LWL (Waterline Length) 23.82 ft / 7.26 m
Beam 10.27 ft / 3.13 m
Max Draft 5.58 ft / 1.70 m
Displacement 6,834.00 lb / 3,100 kg
Ballast 3,329.00 lb / 1,510 kg
Sail Area (Reported) 394.00 ft² / 36.60 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Gary Mull
Builder Nautiber SA (ESP)
First Built 1970
Associations Half Ton Class
Owner Reviews

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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 17.56
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
 48.71
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
 225.74
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
 18.07
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
 2.17
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. 6.54 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 2.48
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. 874.09 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 17.57
Rig Dimensions
I (Foretriangle Height) 38.06 ft / 11.60 m
J (Foretriangle Base) 12.17 ft / 3.71 m
P (Mainsail Luff) 31.50 ft / 9.60 m
E (Mainsail Foot) 10.33 ft / 3.15 m
SA Fore 231.60 ft² / 21.52 m²
SA Main 162.70 ft² / 15.12 m²
SA Total (100%) 394.30 ft² / 36.63 m²
Est. Forestay Length 39.96 ft / 12.18 m
Engine & Accommodations
Engine Type Diesel
Horsepower 13
Fuel Capacity 12 gals / 45 L
Water Capacity 32 gals / 121 L
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