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Bb 10
Designer: Børresen Brothers  ·  Builder: Børresen Bådebyggeri (Den)  ·  First built: 1977
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About the Bb 10

Designed by Denmark's Børresen Brothers and launched in 1977, this 33-foot sailboat represents classic Scandinavian yacht design philosophy with its emphasis on seaworthiness and practical sailing performance. The Bb 10's moderate displacement of 4,956 pounds and substantial ballast ratio create a stable platform that's well-suited for coastal cruising and light offshore passages. The fractional sloop rig with 348 square feet of sail area provides responsive handling while remaining manageable for small crews. Her fin keel and spade rudder configuration delivers good upwind performance and maneuverability in tight quarters. With a beam of just 7.55 feet, the Bb 10 maintains traditional proportions that favor seakindliness over interior volume. The comfort ratio of 19.5 indicates a relatively stiff, quick motion that experienced sailors will appreciate, though it may feel less forgiving to newcomers accustomed to heavier displacement designs. Her capsize screening formula of 1.77 suggests reasonable stability for coastal work, while the hull speed of 6.55 knots reflects respectable performance potential under sail. Built by Børresen Bådebyggeri in Denmark with only 150 hulls produced, the Bb 10 represents quality European construction and has developed a following among sailors who appreciate its honest sailing characteristics and robust build quality.

Core Dimensions
LOA (Length Overall) 32.80 ft / 10.00 m
LWL (Waterline Length) 23.92 ft / 7.29 m
Beam 7.55 ft / 2.30 m
Max Draft 4.80 ft / 1.46 m
Displacement 4,956.00 lb / 2,248 kg
Ballast 2,700.00 lb / 1,225 kg
Ballast Type Lead
Sail Area (Reported) 348.00 ft² / 32.33 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Børresen Brothers
Builder Børresen Bådebyggeri (DEN)
First Built 1977
Number Built 150
Associations Børresen Brothers (DEN)
Related Sailboats H 323 · Farr 1020 · Schock 34 Gp · X 332 Sport · Bavaria 320
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
 19.21
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
 54.48
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
 161.66
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
 19.5
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
 1.77
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. 6.55 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
 3.57
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. 645.29 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. 19.76
Rig Dimensions
I (Foretriangle Height) 30.10 ft / 9.17 m
J (Foretriangle Base) 9.82 ft / 2.99 m
P (Mainsail Luff) 36.09 ft / 11.00 m
E (Mainsail Foot) 11.65 ft / 3.55 m
SA Fore 147.79 ft² / 13.73 m²
SA Main 210.22 ft² / 19.53 m²
SA Total (100%) 358.01 ft² / 33.26 m²
Est. Forestay Length 31.66 ft / 9.65 m
How It Compares

vs. Bavaria 320, Farr 1020, H 323, Schock 34 Gp, X 332 Sport

This boat Similar boats
Dimensions
LOA
Bb 10 ★
32.8 ft
Bavaria 320
33.4 ft
Farr 1020
33.9 ft
H 323
32.3 ft
Schock 34 Gp
33.8 ft
X 332 Sport
33.0 ft
LWL
Bb 10 ★
23.9 ft
Bavaria 320
27.8 ft
Farr 1020
28.4 ft
H 323
25.6 ft
Schock 34 Gp
28.6 ft
X 332 Sport
28.9 ft
Beam
Bb 10 ★
7.6 ft
Bavaria 320
10.5 ft
Farr 1020
10.5 ft
H 323
8.4 ft
Schock 34 Gp
11.6 ft
X 332 Sport
10.8 ft
Displacement
Bb 10 ★
4 lbs
Bavaria 320
8 lbs
Farr 1020
8 lbs
H 323
6 lbs
Schock 34 Gp
8 lbs
X 332 Sport
9 lbs
Ballast
Bb 10 ★
2 lbs
Bavaria 320
3 lbs
Farr 1020
3 lbs
H 323
2 lbs
Schock 34 Gp
3 lbs
X 332 Sport
3 lbs
Sail Area
Bb 10 ★
348 sq ft
Bavaria 320
416 sq ft
Farr 1020
531 sq ft
H 323
384 sq ft
Schock 34 Gp
545 sq ft
X 332 Sport
568 sq ft
Performance
PHRF Rating (lower = faster)
Bb 10 ★
—
Bavaria 320
—
Farr 1020
117 s/nm
H 323
156 s/nm
Schock 34 Gp
90 s/nm
X 332 Sport
—
SA / Displacement (higher = more powerful)
Bb 10 ★
19.2
Bavaria 320
16.5
Farr 1020
21.0
H 323
18.3
Schock 34 Gp
21.0
X 332 Sport
21.0
Ballast / Disp (higher = stiffer)
Bb 10 ★
54.5 %
Bavaria 320
37.8 %
Farr 1020
37.9 %
H 323
42.9 %
Schock 34 Gp
37.9 %
X 332 Sport
34.1 %
Comfort Ratio (higher = more comfortable offshore)
Bb 10 ★
19.5
Bavaria 320
18.7
Farr 1020
18.3
H 323
20.3
Schock 34 Gp
16.7
X 332 Sport
19.4
Capsize Screening (lower = safer)
Bb 10 ★
1.77
Bavaria 320
2.09
Farr 1020
2.09
H 323
1.83
Schock 34 Gp
2.27
X 332 Sport
2.08
Displacement / Length (lower = lighter)
Bb 10 ★
161
Bavaria 320
168
Farr 1020
159
H 323
164
Schock 34 Gp
162
X 332 Sport
166
Hull Speed
Bb 10 ★
6.6 kts
Bavaria 320
7.1 kts
Farr 1020
7.1 kts
H 323
6.8 kts
Schock 34 Gp
7.2 kts
X 332 Sport
7.2 kts
Speed Number (higher = faster)
Bb 10 ★
3.6
Bavaria 320
3.0
Farr 1020
3.8
H 323
3.3
Schock 34 Gp
3.8
X 332 Sport
3.6
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