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Dyas
Designer: Helmut Stöberl  ·  Builder: Leonhard Mader  ·  First built: 1970
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About the Dyas

Sailboat enthusiasts seeking a distinctive vessel will find the Dyas represents an intriguing chapter in sailing history, though detailed specifications remain elusive in modern boat databases. This scarcity of information suggests the Dyas was likely produced in limited numbers or during a specific era when comprehensive documentation wasn't as prevalent as today's standards. Despite the limited available data, the Dyas appears to have been designed with recreational sailing in mind, likely suited for coastal cruising and day sailing applications. The boat's design philosophy seems to have emphasized practical sailing characteristics over extreme performance, making it an appealing choice for sailors who valued reliability and comfortable handling over racing capabilities. What makes the Dyas particularly interesting for boat researchers is its relative obscurity in contemporary sailing circles, which often indicates either a boutique manufacturer or a design that was ahead of its time. Potential buyers should expect to conduct thorough inspections and research when evaluating a Dyas, as finding replacement parts or detailed maintenance information may require connecting with specialized marine historians or former owners who possess institutional knowledge about these vessels' unique characteristics and quirks.

Core Dimensions
LOA (Length Overall) 23.46 ft / 7.15 m
LWL (Waterline Length) 19.80 ft / 6.04 m
Beam 6.40 ft / 1.95 m
Max Draft 3.61 ft / 1.10 m
Displacement 1,334.00 lb / 605 kg
Ballast 573.00 lb / 260 kg
Sail Area (Reported) 236.80 ft² / 22.00 m²
Design & Construction
Hull Type Fin Keel
Rigging Type Fractional Sloop
Construction FG
Designer Helmut Stöberl
Builder Leonhard Mader
First Built 1970
Owner Reviews

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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
204
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
31.33
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
8.32
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
2.33
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. 5.96
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
6.23
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. 452.78
Rig Dimensions
I (Foretriangle Height) 23.1
J (Foretriangle Base) 6.3
P (Mainsail Luff) 26.2
E (Mainsail Foot) 9.4
SA Fore 72.77
SA Main 123.14
How It Compares

vs. Granada 24, Pearson 24, Santana 23 D

This boat Similar boats
Dimensions
LOA
Dyas ★
23.5 ft
Granada 24
23.4 ft
Pearson 24
23.5 ft
Santana 23 D
23.3 ft
LWL
Dyas ★
19.8 ft
Granada 24
21.3 ft
Pearson 24
18.5 ft
Santana 23 D
20.6 ft
Beam
Dyas ★
6.4 ft
Granada 24
8.3 ft
Pearson 24
8.0 ft
Santana 23 D
8.8 ft
Displacement
Dyas ★
1 lbs
Granada 24
3 lbs
Pearson 24
4 lbs
Santana 23 D
2 lbs
Ballast
Dyas ★
573 lbs
Granada 24
1 lbs
Pearson 24
1 lbs
Santana 23 D
1 lbs
Sail Area
Dyas ★
236 sq ft
Granada 24
246 sq ft
Pearson 24
Santana 23 D
284 sq ft
Performance
PHRF Rating (lower = faster)
Dyas ★
204 s/nm
Granada 24
Pearson 24
252 s/nm
Santana 23 D
174 s/nm
SA / Displacement (higher = more powerful)
Dyas ★
31.3
Granada 24
15.8
Pearson 24
Santana 23 D
24.1
Ballast / Disp (higher = stiffer)
Dyas ★
Granada 24
47.2 %
Pearson 24
41.9 %
Santana 23 D
43.5 %
Comfort Ratio (higher = more comfortable offshore)
Dyas ★
8.3
Granada 24
16.8
Pearson 24
Santana 23 D
10.3
Capsize Screening (lower = safer)
Dyas ★
2.33
Granada 24
2.09
Pearson 24
Santana 23 D
2.57
Displacement / Length (lower = lighter)
Dyas ★
Granada 24
184
Pearson 24
303
Santana 23 D
132
Hull Speed
Dyas ★
6.0 kts
Granada 24
6.2 kts
Pearson 24
Santana 23 D
6.1 kts
Speed Number (higher = faster)
Dyas ★
6.2
Granada 24
2.7
Pearson 24
Santana 23 D
4.6
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