Roberts 370

Roberts 370

Description

The Bruce Roberts 370, part of the renowned Spray series designed in the 1970s by Australian naval architect Bruce Roberts for ambitious owner-builders, is a robust bluewater cruising sloop or cutter renowned for its multi-chine steel, aluminum, or fiberglass hulls and expedition-ready versatility, with dozens constructed worldwide for global voyages emphasizing durability and self-sufficiency. Measuring 37 feet 4 inches LOA (up to 39 feet for the S370A variant) with a 31-foot-8-inch LWL, 12-foot-4-inch beam, draft options of 4 feet 9 inches (shoal) or 6 feet 6 inches (deep fin keel), and a displacement of approximately 18,760 pounds including 7,000-8,000 pounds of ballast, this masthead-rigged vessel features a sail area of around 650-700 square feet across mainsail (P=40 ft, E=14 ft), genoa, and staysail for efficient performance in 15-35 knot winds, achieving 7-8.5 knot hull speeds with a stable, sea-kindly motion and options for pilothouse or center-cockpit layouts. Powered by a 30- to 50-horsepower diesel auxiliary like the Yanmar 4JH, its classic lines include a clipper bow, canoe stern, and moderate sheer on a heavy-duty welded or hand-laid hull with foam core decks, providing 6-foot-6-inch headroom in a voluminous interior for 6-8 berths across V-berth forward, U-shaped saloon, double aft cabin, L-galley, dual heads with showers, and generous tankage of 100-150 gallons fuel and 150-200 gallons water for extended autonomy. Proven in Pacific crossings and Antarctic expeditions—as in aluminum 370E builds like Soteria and steel S370B circumnavigators—the Roberts 370 delivers timeless seaworthiness and liveaboard comfort, making it a perennial choice for couples or small crews seeking adventure without compromise.

Construction Details

Designer Bruce Roberts-Goodson
Length 37.330 ft
LOA 37.330 ft
LWL 31.660 ft
Beam 12.330 ft
Displacement 18760 lb
Ballast 8000 lb
Max Draft 6.500 ft
Min Draft 4.750 ft
Request A Sail Quote

The standard boat dimensions

i 45.75 ft
j 16.37 ft
p 40.22 ft
e 13.83 ft
p2 -
e2 -
i2 -
j2 -

Sails

Roberts 370 - MAINSAIL

Luff * 40.22 ft - (12259 mm)
Foot * 13.83 ft - (4215 mm)
Leech * 41.8 ft - (12741 mm)
Tack Angle * 88 °
Diagonal * 42.07 ft - (12823 mm)
Head (inches) * 6 in - (152 mm)
Area * 286.77 ft²
Edit in Calculator

Roberts 370 - JIBSAIL

Luff * 38.87 ft - (11848 mm)
Foot * 22.12 ft - (6742 mm)
Leech * 33.12 ft - (10095 mm)
Percentage LP * 115 %
Length Perpendicular * 18.83 ft - (5739 mm)
Deck Angle * 12 °
Area 365.82 ft²
Edit in Calculator

Roberts 370 - GENOA

Luff * 46.16 ft - (14070 mm)
Foot * 26.81 ft - (8172 mm)
Leech * 43.07 ft - (13128 mm)
Percentage LP * 149.97 %
Length Perpendicular * 24.55 ft - (7483 mm)
Deck Angle * 4 °
Area * 566.63 ft²
Edit in Calculator

Roberts 370 - ASYMMETRICAL

Luff 47 ft - (14326 mm)
Foot 28 ft - (8534 mm)
Leech 44 ft - (13411 mm)
Perc LP * 165 %
Area * 987 ft²
Edit in Calculator

Roberts 370 - STAYSAIL

Luff 32 ft - (9754 mm)
Foot 12 ft - (3658 mm)
Leech 29 ft - (8839 mm)
Length Perpendicular * 10.86 ft - (3310 mm)
Area * 173.73 ft²
Edit in Calculator

Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.

Comments