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Sovereign 51
Designer: Phil Southwell  ·  Builder: Scholtz Marine (South Africa)  ·  First built: 1995
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About the Sovereign 51

A capable and spacious bluewater cruiser, the Sovereign 51 was designed with serious offshore passage-making in mind. Built to carry couples or small crews comfortably across extended ocean passages, this vessel offers the kind of interior volume and deck space that experienced cruisers tend to prioritize when planning long-distance voyages. With its substantial hull length, the Sovereign 51 falls into a category of cruising sailboats that balances comfortable liveaboard amenities with genuine blue-water capability. Boats of this size and character typically feature generous storage capacity, a well-protected cockpit, and a layout suited to short-handed sailing — qualities that appeal to those planning extended coastal or offshore adventures. While detailed specifications for this model remain limited in available records, the Sovereign 51 appears to occupy a respected niche among dedicated cruising sailors who value reliability and range over racing performance. Prospective buyers researching this vessel would be well advised to connect with current or past owners, as firsthand accounts and sea trial experience will provide the clearest picture of how this boat performs across a variety of conditions and passages.

Core Dimensions
LOA (Length Overall) 51.00 ft / 15.54 m
LWL (Waterline Length) 43.50 ft / 13.26 m
Beam 14.67 ft / 4.47 m
Max Draft 6.17 ft / 1.88 m
Displacement 31,800.00 lb / 14,424 kg
Ballast 12,320.00 lb / 5,588 kg
Design & Construction
Hull Type Fin Keel
Rigging Type Masthead Sloop
Construction FG
Designer Phil Southwell
Builder Scholtz Marine (SOUTH AFRICA)
First Built 1995
Owner Reviews

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Known Issues & What to Watch For

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Performance Ratios
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
38.74
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
172.47
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. 13.67 pounds/inch
Rig Dimensions
I (Foretriangle Height) 38.74
P (Mainsail Luff) Diesel
E (Mainsail Foot) Volvo Penta
Engine & Accommodations
Fuel Capacity 105 gals / 397 L
Water Capacity 158 gals / 598 L
How It Compares

vs. Bavaria 51, Bristol 51, Valiant 50

This boat Similar boats
Dimensions
LOA
Sovereign 51 ★
51.0 ft
Bavaria 51
51.2 ft
Bristol 51
51.1 ft
Valiant 50
50.7 ft
LWL
Sovereign 51 ★
43.5 ft
Bavaria 51
42.0 ft
Bristol 51
42.0 ft
Valiant 50
40.3 ft
Beam
Sovereign 51 ★
14.7 ft
Bavaria 51
15.1 ft
Bristol 51
15.2 ft
Valiant 50
13.8 ft
Displacement
Sovereign 51 ★
31 lbs
Bavaria 51
31 lbs
Bristol 51
43 lbs
Valiant 50
35 lbs
Ballast
Sovereign 51 ★
12 lbs
Bavaria 51
Bristol 51
19 lbs
Valiant 50
11 lbs
Performance
PHRF Rating (lower = faster)
Sovereign 51 ★
Bavaria 51
Bristol 51
69 s/nm
Valiant 50
102 s/nm
Ballast / Disp (higher = stiffer)
Sovereign 51 ★
38.7 %
Bavaria 51
Bristol 51
43.5 %
Valiant 50
31.0 %
Displacement / Length (lower = lighter)
Sovereign 51 ★
172
Bavaria 51
192
Bristol 51
263
Valiant 50
243
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