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Sailboat Specifications

Southerly 430

Fractional Sloop · Swing Keel W/Dual Rudders

Designed by Rob Humphreys · Built by Northshore Yachts Ltd (Uk) · First built 2010

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LOA 42.19 ft  ·  Beam 13.22 ft  ·  Displacement 25,003.00 lb  ·  Sail Area 792.45 ft²  ·  Fractional Sloop  ·  Swing Keel W/Dual Rudders
About the Southerly 430 Sailboat

Rob Humphreys' design expertise shines through in the Southerly 430, a sophisticated cruising yacht that exemplifies the innovative spirit of Britain's Northshore Yachts. Built from 2010 onward, this 42-foot fractional sloop represents the evolution of the renowned Southerly line, famous for pioneering swing keel technology in serious cruising yachts. The defining characteristic of the Southerly 430 lies in its ingenious swing keel configuration paired with dual rudders, allowing draft reduction from 8.92 feet to just a few feet. This versatility opens up shallow anchorages and tidal waters typically inaccessible to fixed-keel yachts of similar size, making it exceptional for exploring European canals, shallow Caribbean waters, or the intricate coastlines of the British Isles. With a displacement of 25,003 pounds and comfortable beam of 13.22 feet, the 430 strikes an appealing balance between seaworthiness and interior volume. The capsize screening formula of 1.81 and comfort ratio of 32.52 indicate a yacht capable of offshore passages while maintaining reasonable motion at sea. Her 792.45 square feet of sail area provides adequate power, while the 57-horsepower engine ensures reliable auxiliary propulsion in challenging conditions or tight quarters.

Dimensions & Specifications
LOA (Length Overall) 42.19 ft / 12.86 m
LWL (Waterline Length) 36.45 ft / 11.11 m
Beam 13.22 ft / 4.03 m
Max Draft 8.92 ft / 2.72 m
Min Draft 2.76 ft / 0.84 m
Displacement 25,003.00 lb / 11,341 kg
Ballast 8,091.00 lb / 3,670 kg
Sail Area (Reported) 792.45 ft² / 73.62 m²
Design & Construction
Hull Type Swing keel w/dual rudders
Rigging Type Fractional Sloop
Construction GRP
Designer Rob Humphreys
Builder Northshore Yachts Ltd (UK)
First Built 2010
Related Sailboats Ovni 43 · Oceanis 423 Beneteau · Nordship 40 Ds · X 412 · Hylas 42
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Engine & Accommodations
Engine Make Yanmar
Engine Model 4JH5E
Engine Type Diesel
Horsepower 57
Fuel Capacity 79 gals / 299 L
Water Capacity 71 gals / 269 L
Frequently Asked Questions

What is the Southerly 430's sail area to displacement ratio?

The Southerly 430 has a Sail Area to Displacement ratio (SA/D) of 14.89. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Southerly 430's comfort ratio?

The Southerly 430 has a Ted Brewer Comfort Ratio of 32.52. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Southerly 430 safe for offshore sailing?

The Southerly 430 has a Capsize Screening Formula value of 1.81. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Southerly 430?

The theoretical hull speed of the Southerly 430 is 8.09 kn knots, calculated from its waterline length.

How much does a Southerly 430 weigh?

The Southerly 430 has a displacement of 25,003.00 lb and a length overall (LOA) of 42.19 ft.

Who designed the Southerly 430?

The Southerly 430 was designed by Rob Humphreys, first built in 2010.