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Sailboat Specifications

Atlanta 28

Masthead Sloop · Twin Keel

Designed by Csj Roy · Built by Atlanta Marine (Uk) · First built 1977

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LOA 28.00 ft  ·  Beam 9.16 ft  ·  Displacement 7,286.00 lb  ·  Sail Area 275.00 ft²  ·  Masthead Sloop  ·  Twin Keel
About the Atlanta 28 Sailboat

Designed by Csj Roy and built by Atlanta Marine in the UK starting in 1977, this 28-footer stands out as a practical coastal cruiser with distinctive twin-keel configuration. The twin keels provide excellent stability in shallow waters and allow the boat to sit upright when beached or dried out, making it particularly appealing for exploring tidal areas and shallow anchorages where traditional deep-draft boats cannot venture. With a displacement of 7,286 pounds and substantial ballast of 3,500 pounds, the Atlanta 28 offers reassuring stability for coastal cruising. The masthead sloop rig carries 275 square feet of sail area, providing adequate power for leisurely sailing while remaining manageable for small crews. Her beam of 9.16 feet creates reasonable interior volume for weekend cruising, while the moderate draft of 4.67 feet (when keels are down) allows access to a wide range of harbors and anchorages. The comfort ratio of 23.66 suggests this is a motion-conscious design suited to those who prefer steady, predictable sailing characteristics over racing performance. The capsize screening formula of 1.89 indicates good stability margins for coastal waters. This fiberglass construction boat appeals particularly to sailors seeking shoal-water capability without sacrificing seaworthiness for protected coastal exploration.

Dimensions & Specifications
LOA (Length Overall) 28.00 ft / 8.53 m
LWL (Waterline Length) 23.58 ft / 7.19 m
Beam 9.16 ft / 2.79 m
Max Draft 4.67 ft / 1.42 m
Displacement 7,286.00 lb / 3,305 kg
Ballast 3,500.00 lb / 1,588 kg
Sail Area (Reported) 275.00 ft² / 25.55 m²
Design & Construction
Hull Type Twin Keel
Rigging Type Masthead Sloop
Construction FG
Designer CSJ Roy
Builder Atlanta Marine (UK)
First Built 1977
Related Sailboats Southerly 28 · Seal 28 · Impala 28 Thomas · Grampian 28 · Aloha 28
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Engine & Accommodations
Engine Make Volvo
Engine Model 2002
Engine Type Diesel
Fuel Capacity 16 gals / 61 L
Frequently Asked Questions

What is the Atlanta 28's sail area to displacement ratio?

The Atlanta 28 has a Sail Area to Displacement ratio (SA/D) of 11.74. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Atlanta 28's comfort ratio?

The Atlanta 28 has a Ted Brewer Comfort Ratio of 23.66. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Atlanta 28 safe for offshore sailing?

The Atlanta 28 has a Capsize Screening Formula value of 1.89. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Atlanta 28?

The theoretical hull speed of the Atlanta 28 is 6.51 kn knots, calculated from its waterline length.

How much does a Atlanta 28 weigh?

The Atlanta 28 has a displacement of 7,286.00 lb and a length overall (LOA) of 28.00 ft.

Who designed the Atlanta 28?

The Atlanta 28 was designed by Csj Roy, first built in 1977.