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Sailboat Specifications

Z 31

Fractional Sloop · Swing Keel W/Dual Rudders

Designed by Cde-Danish Marine Design · First built 2002

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LOA 30.97 ft  ·  Beam 10.76 ft  ·  Displacement 4,916.31 lb  ·  Sail Area 457.47 ft²  ·  Fractional Sloop  ·  Swing Keel W/Dual Rudders
About the Z 31 Sailboat

A compact and capable sailboat, the Z 31 offers an accessible entry point for sailors looking to explore coastal and inshore waters with confidence. While detailed specifications remain limited, the Z 31's modest proportions suggest it is well suited to day sailing and weekend cruising, appealing to those seeking a manageable yet rewarding sailing experience. Designed with approachability in mind, the Z 31 is likely to attract newer sailors as well as experienced hands looking for a low-maintenance vessel that still delivers genuine sailing performance. Its size places it firmly in the category of boats that can be handled comfortably by a small crew or even a capable solo sailor, making it a practical choice for those who value independence on the water. Though it may not carry the widespread recognition of more established production sailboats, the Z 31 represents a solid platform for building skills and enjoying relaxed sailing close to shore. Prospective buyers are encouraged to inspect available examples carefully and consult with owners or surveyors to get a fuller picture of this boat's real-world performance and condition.

Dimensions & Specifications
LOA (Length Overall) 30.97 ft / 9.44 m
LWL (Waterline Length) 27.46 ft / 8.37 m
Beam 10.76 ft / 3.28 m
Max Draft 6.89 ft / 2.10 m
Min Draft 3.28 ft / 1.00 m
Displacement 4,916.31 lb / 2,230 kg
Ballast 1,653.47 lb / 750 kg
Sail Area (Reported) 457.47 ft² / 42.50 m²
Design & Construction
Hull Type Swing keel w/dual rudders
Rigging Type Fractional Sloop
Designer CDE-Danish Marine Design
First Built 2002
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Frequently Asked Questions

What is the Z 31's sail area to displacement ratio?

The Z 31 has a Sail Area to Displacement ratio (SA/D) of 25.39. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Z 31's comfort ratio?

The Z 31 has a Ted Brewer Comfort Ratio of 11.26. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Z 31 safe for offshore sailing?

The Z 31 has a Capsize Screening Formula value of 2.53. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Z 31?

The theoretical hull speed of the Z 31 is 7.02 knots, calculated from its waterline length.

How much does a Z 31 weigh?

The Z 31 has a displacement of 4,916.31 lb and a length overall (LOA) of 30.97 ft.

Who designed the Z 31?

The Z 31 was designed by Cde-Danish Marine Design, first built in 2002.