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Dehler 36 Sq
Designer: Judel/Vrolijk  ·  Builder: Dehler  ·  First built: 2001
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About the Dehler 36 Sq

Designed by the renowned German naval architecture firm Judel/Vrolijk and built by Dehler starting in 2001, this 36-footer represents the builder's commitment to performance-oriented cruising yachts. The "Sq" designation reflects the boat's square-top mainsail configuration, which enhances sailing performance by increasing sail area in the upper portions where winds are typically stronger and steadier. With a displacement of 14,109 pounds and a sail area-to-displacement ratio of 20.27, this fractional sloop delivers spirited performance while maintaining cruising comfort. The fin keel with bulb and spade rudder configuration provides excellent maneuverability and upwind performance, making it well-suited for both coastal cruising and club racing. The boat's moderate displacement and efficient hull design yield a theoretical hull speed of 7.66 knots. The comfortable 25.13 comfort ratio and reasonable 1.9 capsize screening value indicate this yacht strikes a nice balance between performance and seaworthiness for extended coastal passages. Built with fiberglass construction and powered by a 29-horsepower auxiliary engine, the Dehler 36 Sq appeals to sailors seeking a responsive yacht capable of spirited day sailing while offering the comfort and capability needed for weekend getaways and longer coastal adventures.

Core Dimensions
LOA (Length Overall) 35.92 ft / 10.95 m
LWL (Waterline Length) 32.64 ft / 9.95 m
Beam 11.48 ft / 3.50 m
Max Draft 6.50 ft / 1.98 m
Displacement 14,109.00 lb / 6,400 kg
Ballast 5,203.00 lb / 2,360 kg
Ballast Type Iron or Lead
Sail Area (Reported) 737.00 ft² / 68.47 m²
Design & Construction
Hull Type Fin w/bulb & spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Judel/Vrolijk
Builder Dehler
First Built 2001
Related Sailboats ["Sun Odyssey 36I Perf Jeanneau" · "Comet 36" · "J36 Classic" · "Frers 36" · "Sigma 362"]
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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
 81
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
 20.27
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
 36.88
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
 181.13
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
 25.13
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
 1.9
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. 7.66 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
 3.26
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. 1,338.87 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. 19.66
Rig Dimensions
I (Foretriangle Height) 48.39 ft / 14.75 m
J (Foretriangle Base) 13.91 ft / 4.24 m
P (Mainsail Luff) 46.59 ft / 14.20 m
E (Mainsail Foot) 16.24 ft / 4.95 m
SA Fore 336.55 ft² / 31.27 m²
SA Main 378.31 ft² / 35.15 m²
SA Total (100%) 714.86 ft² / 66.41 m²
Est. Forestay Length 50.35 ft / 15.35 m
Mast Height (DWL) 58.75 ft / 17.91 m
Engine & Accommodations
Engine Make Volvo Penta
Engine Model D1-30
Engine Type Diesel
Horsepower 29
Fuel Capacity 24 gals / 91 L
Water Capacity 67 gals / 254 L
How It Compares

vs. Comet 36, Frers 36, J36 Classic

This boat Similar boats
Dimensions
LOA
Dehler 36 Sq ★
35.9 ft
Comet 36
36.0 ft
Frers 36
36.0 ft
J36 Classic
36.0 ft
LWL
Dehler 36 Sq ★
32.6 ft
Comet 36
29.7 ft
Frers 36
29.5 ft
J36 Classic
30.5 ft
Beam
Dehler 36 Sq ★
11.5 ft
Comet 36
11.9 ft
Frers 36
12.0 ft
J36 Classic
11.8 ft
Displacement
Dehler 36 Sq ★
14 lbs
Comet 36
13 lbs
Frers 36
10 lbs
J36 Classic
10 lbs
Ballast
Dehler 36 Sq ★
5 lbs
Comet 36
—
Frers 36
5 lbs
J36 Classic
4 lbs
Sail Area
Dehler 36 Sq ★
737 sq ft
Comet 36
651 sq ft
Frers 36
—
J36 Classic
662 sq ft
Performance
PHRF Rating (lower = faster)
Dehler 36 Sq ★
81 s/nm
Comet 36
120 s/nm
Frers 36
93 s/nm
J36 Classic
—
SA / Displacement (higher = more powerful)
Dehler 36 Sq ★
20.3
Comet 36
18.1
Frers 36
—
J36 Classic
22.1
Ballast / Disp (higher = stiffer)
Dehler 36 Sq ★
36.9 %
Comet 36
—
Frers 36
49.5 %
J36 Classic
—
Comfort Ratio (higher = more comfortable offshore)
Dehler 36 Sq ★
25.1
Comet 36
25.1
Frers 36
—
J36 Classic
19.1
Capsize Screening (lower = safer)
Dehler 36 Sq ★
1.90
Comet 36
1.99
Frers 36
—
J36 Classic
2.15
Displacement / Length (lower = lighter)
Dehler 36 Sq ★
181
Comet 36
236
Frers 36
189
J36 Classic
—
Hull Speed
Dehler 36 Sq ★
7.7 kts
Comet 36
7.3 kts
Frers 36
—
J36 Classic
7.4 kts
Speed Number (higher = faster)
Dehler 36 Sq ★
3.3
Comet 36
2.4
Frers 36
—
J36 Classic
3.8
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