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BayCruiser 21

Cruiser-Racer Built by Swallow Yachts

Boat highlights

BayCruiser 21 is currently estimated in the Good band with an SBP score of 112.

Length overall

19.8 ft

Primary sail area

205 ft²

Displacement

1,323 lbs

Performance band: Good GPH rating: 787
112
SBP score
Good band

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Performance Analysis

Detailed performance metrics and polar diagram for BayCruiser 21.

Methodology note: SBP scores, polar diagrams, hull-speed values, and derived ratios are estimates. Use them for comparison and planning support—not as a substitute for manufacturer specifications, measured sea trials, rating certificates, professional weather routing, or safety margins. Review how we rate boats.

Performance Metrics

SBP Score
112
ORC GPH
787
Average Speed (GPH)
4.6 kn
Yardstick
111.9
Sail Carry Number
5.2
Planing Potential
1.3 (very high)
Hull Speed
5.4 kn

Speed Estimates

Wind Speed (kn)Beat VMG (kn)Run VMG (kn)
62.82.9
83.43.7
103.84.3
124.04.9
144.15.3
164.15.7
204.17.1

Polar Diagram

Wind Speed (kn)

Key Specifications

Explore the hull dimensions and sail plan for BayCruiser 21.

Dimensions

Length over all 19.75 ft
Length at Waterline 16.45 ft
Hull Speed 5.4 kn
Beam 7.15 ft
Draft 4.92 ft
Displacement 1,323 lbs

Sails

Main Sail Area 113.02 ft²
Foresail Area 91.49 ft²
Upwind Sail Area 204.51 ft²
Spinnaker/Gennaker Area N/A ft²

Construction ratios

Sail area-to-displacement (SA/D)
27.2
Capsize screening (CSF)
2.58
Comfort ratio (CR)
8.5

Discussion

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Data sources and methodology

Published specifications are kept separate from calculated ratios and estimated performance. SBP and speed outputs are model-based estimates, not owner ratings or certified handicaps.

Specifications
verified
Ratios
derived
Performance
estimated

Last checked: 19 Jan 2025. Source: Swallow Yachts official website. Read the SBP methodology.

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GPH Rating 750
111
SBP Score
Good
GPH Rating 702
111
SBP Score
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GPH Rating 674
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SBP Score
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GPH Rating 754
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SBP Score
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GPH Rating 697
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SBP Score
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