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Sailboat Specifications

Sq 25

Fractional Sloop · Fin W/Bulb And Transom Hung Rudder

Designed by Marc-Oliver V. Ahlen · Built by Sq Yachts (Ger) · First built 2014

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LOA 24.61 ft  ·  Beam 8.17 ft  ·  Displacement 3,527.40 lb  ·  Sail Area 376.74 ft²  ·  Fractional Sloop  ·  Fin W/Bulb And Transom Hung Rudder
About the Sq 25 Sailboat

Designed by Marc-Oliver V. Ahlen and launched in 2014, this German-built performance cruiser represents a modern approach to compact sailing. The Sq 25 combines sportboat characteristics with practical cruising capabilities, making it an appealing choice for sailors seeking both excitement and comfort in a trailerable package. Built by Sq Yachts using GRP construction, the design features a distinctive fin keel with bulb and transom-hung rudder configuration that delivers impressive sailing performance. The fractional sloop rig provides excellent sail handling characteristics, while the generous sail area of 376.74 square feet and substantial SA/Displacement ratio of 26.08 indicate this boat was designed to move efficiently in light to moderate conditions. With a displacement of 3,527.40 pounds and a comfort ratio of 14.53, the Sq 25 strikes a balance between performance and seaworthiness. The capsize screening formula of 2.15 suggests good stability characteristics for coastal cruising and club racing. The deep 5.25-foot draft provides excellent upwind performance, though it may limit access to shallow anchorages. This versatile design suits weekend cruising, coastal exploration, and spirited day sailing, appealing to sailors who appreciate German engineering precision in a compact, well-balanced package.

Dimensions & Specifications
LOA (Length Overall) 24.61 ft / 7.50 m
LWL (Waterline Length) 22.11 ft / 6.74 m
Beam 8.17 ft / 2.49 m
Max Draft 5.25 ft / 1.60 m
Displacement 3,527.40 lb / 1,600 kg
Ballast Type Cast iron fin with lead bulb
Sail Area (Reported) 376.74 ft² / 35.00 m²
Design & Construction
Hull Type Fin w/bulb and transom hung rudder
Rigging Type Fractional Sloop
Construction GRP
Designer Marc-Oliver v. Ahlen
Builder SQ Yachts (GER)
First Built 2014
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Frequently Asked Questions

What is the Sq 25's sail area to displacement ratio?

The Sq 25 has a Sail Area to Displacement ratio (SA/D) of 26.08. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Sq 25's comfort ratio?

The Sq 25 has a Ted Brewer Comfort Ratio of 14.53. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Sq 25 safe for offshore sailing?

The Sq 25 has a Capsize Screening Formula value of 2.15. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Sq 25?

The theoretical hull speed of the Sq 25 is 6.30 kn knots, calculated from its waterline length.

How much does a Sq 25 weigh?

The Sq 25 has a displacement of 3,527.40 lb and a length overall (LOA) of 24.61 ft.

Who designed the Sq 25?

The Sq 25 was designed by Marc-Oliver V. Ahlen, first built in 2014.