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Sailboat Specifications

Thompson 30

Fractional Sloop · Lifting Keel

Designed by Steve Thompson · Built by Stirling Boats · First built 1998

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LOA 30.67 ft  ·  Beam 10.17 ft  ·  Displacement 3,300.00 lb  ·  Fractional Sloop  ·  Lifting Keel
About the Thompson 30 Sailboat

Designed by Steve Thompson and built by Stirling Boats beginning in 1998, this 30-footer represents a sophisticated approach to performance cruising with its advanced carbon/kevlar foam-core construction. The lifting keel configuration makes this sailboat particularly appealing for exploring shallow waters and accessing harbors that would challenge traditional deep-draft vessels, while the 8-foot maximum draft provides excellent upwind performance when the keel is deployed. The fractional sloop rig and relatively light 3,300-pound displacement suggest this boat was designed with performance in mind, though the substantial 1,980-pound ballast ratio ensures solid stability. With a comfort ratio of 7.84, the Thompson 30 falls into the light displacement category that favors speed over ultimate comfort in heavy seas, making it well-suited for coastal cruising, club racing, and spirited day sailing. The modern construction materials contribute to both reduced weight and increased strength, while the lifting keel system opens up cruising grounds typically reserved for shoal-draft designs. This combination of features creates a versatile platform that appeals to sailors seeking performance without sacrificing the ability to explore diverse coastal environments and anchor in protected shallow bays.

Dimensions & Specifications
LOA (Length Overall) 30.67 ft / 9.35 m
LWL (Waterline Length) 29.17 ft / 8.89 m
Beam 10.17 ft / 3.10 m
Max Draft 8.00 ft / 2.44 m
Min Draft 2.00 ft / 0.61 m
Displacement 3,300.00 lb / 1,497 kg
Ballast 1,980.00 lb / 898 kg
Ballast Type Lead
Design & Construction
Hull Type Lifting Keel
Rigging Type Fractional Sloop
Construction carbon/kevlar with foam core
Designer Steve Thompson
Builder Stirling Boats
First Built 1998
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Engine & Accommodations
Engine Make OB in retractable pod
Frequently Asked Questions

What is the Thompson 30's comfort ratio?

The Thompson 30 has a Ted Brewer Comfort Ratio of 7.84. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Thompson 30 safe for offshore sailing?

The Thompson 30 has a Capsize Screening Formula value of 2.74. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Thompson 30?

The theoretical hull speed of the Thompson 30 is 7.24 kn knots, calculated from its waterline length.

How much does a Thompson 30 weigh?

The Thompson 30 has a displacement of 3,300.00 lb and a length overall (LOA) of 30.67 ft.

Who designed the Thompson 30?

The Thompson 30 was designed by Steve Thompson, first built in 1998.