The Triangle One Design (OD), fundamentally recognized as the Triangle 32, emerged in the 1960s as a sophisticated collaboration between designer Charles MacGregor and the venerable Graves Yacht Yard of Marblehead, Massachusetts. At a time when the transition from wood to fiberglass was still in its adolescence, the Triangle OD stood out as a heavily built, offshore-capable ketch that prioritized versatility and interior volume. Built to the exacting standards of the Graves family—who had already established a reputation for elite craftsmanship with their racing dories and custom wooden builds—the Triangle OD was one of the yard’s most successful ventures into the production fiberglass market.
Triangle OD Information, Review, Specs

- Make
- Triangle
- Model
- OD
- Builder
- James Graves
- Designer
- John Alden
- Number Built
- 60
- Production Year(s)
- 1926 - 1933
The vessel is characterized by its moderate displacement, a shoal-draft centerboard configuration, and a distinctive mid-cockpit layout that was exceptionally rare for a 32-foot boat in that era. By utilizing the "Triangle" branding, MacGregor emphasized a design philosophy centered on stability, safety, and a "three-point" living arrangement that maximized privacy for cruising families. While Graves Yacht Yard is often celebrated for its custom work, the Triangle OD remains a primary example of their ability to execute high-quality series production, a legacy further explored in historical contexts provided by the Marblehead Museum.
Sailing Performance & Handling
The Triangle OD is a quintessential "sailor’s cruiser," designed more for the steady trades and coastal gales of the Atlantic than for light-air harbor racing. With a displacement-to-length ratio that leans toward the heavier side of moderate, the boat possesses significant momentum, allowing it to power through chop where lighter contemporary designs might hobby-horse. The ketch rig is the most common configuration, providing a versatile "sail plan for all seasons." Owners frequently note the ease of balancing the boat under "jib and jigger" (mizzen and headsail) when the wind picks up, a configuration that keeps the center of effort low and the boat remarkably stable.
The defining characteristic of its handling is the centerboard. With the board up, the boat draws only 3' 6", allowing it to explore the thin waters of the Chesapeake or the Bahamas—territory usually reserved for much smaller craft. When the board is lowered, it provides the necessary lateral plane to improve upwind tracking, though, like many ketch-rigged cruisers of its generation, it is not an exceptionally close-winded vessel. Technical insights from Jim Taylor Yacht Design, who worked closely with Graves Yacht Yard on subsequent projects, suggest that the yard's commitment to structural rigidity ensured that these hulls maintained their shape and performance characteristics even after decades of hard use.
Interior Comfort & Variations
The interior of the Triangle OD was revolutionary for the early 1960s, featuring a split-cabin arrangement made possible by its mid-cockpit design. This layout provides a degree of privacy typically found only on vessels 40 feet or larger. The "Great Cabin" aft serves as a dedicated sanctuary, often featuring two berths and its own storage, separated from the main saloon by the cockpit. This variation makes the boat an ideal platform for two couples or a family with older children who require separate sleeping quarters.
In the main saloon, the Triangle OD offers a surprisingly airy feel, aided by a relatively wide beam for its length. The galley is typically positioned to provide easy access to the cockpit, while the forward V-berth offers additional sleeping capacity. Materials used by Graves were of a higher grade than many mass-market builders of the time; high-quality teak joinery and robust bronze portlights are common hallmarks. The "Big Sister" to the OD, the Triangle 40, utilized a similar but expanded philosophy, while the smaller sibling, the Triangle 20, offered a simplified version of this "pocket cruiser" concept without the aft cabin.
Known Issues & Buyer’s Checklist
Prospective buyers of a Triangle OD should approach the survey with a focus on the boat's age and its unique mechanical features. As these boats were built in the early days of fiberglass, the hulls are often over-engineered and thick, but the decks may feature balsa or plywood coring that is susceptible to delamination if hardware has not been re-bedded.
- Centerboard Trunk and Pennant: The centerboard mechanism is a high-wear area. Inspect the pivot pin for play and the pennant for fraying. The trunk itself can be a source of leaks if the fiberglass has been compromised by grounding or electrolysis.
- Mizzen Chainplates: On ketch-rigged models, the mizzen stays are sometimes overlooked. Check the chainplates where they meet the deck for signs of water intrusion or stress cracking in the fiberglass.
- Engine Access: Because of the aft-cabin and mid-cockpit configuration, the engine is often located under the cockpit sole. Access can be tight, and the cooling systems on original Atomic 4 or early diesel repowers should be checked for corrosion in the exhaust risers.
- Hardware Bedding: The Triangle OD features significant deck hardware; ensure that the stanchion bases and cleats remain watertight, as old bedding compound can fail, leading to core rot.
Community & Resources
The community surrounding these vessels is small but fiercely loyal, often centered around enthusiasts of Charles MacGregor’s designs and the heritage of Marblehead shipbuilding. Technical documentation and historical brochures are occasionally maintained by local maritime historical societies in Massachusetts. While no singular global "class association" currently manages a racing circuit, the Triangle 32/OD is a frequent topic of discussion among members of the "Good Old Boat" community, where the model is celebrated as a premier example of mid-century American fiberglass construction.
The Verdict
The Triangle OD is a rugged, character-filled cruiser that offers a unique layout and "go-anywhere" capability thanks to its centerboard design. It is a vessel for the traditionalist who values the pedigree of a Marblehead build over modern, high-volume aesthetics.
Pros:
- Innovative aft-cabin layout provides exceptional privacy for a 32-foot boat.
- Shoal draft capability opens up cruising grounds inaccessible to most keelboats.
- Extremely robust fiberglass construction from a prestigious yard.
- The ketch rig offers versatile sail handling in heavy weather.
Cons:
- Mid-cockpit design can feel cramped for large social gatherings.
- Upwind performance is modest compared to modern fin-keel sloops.
- Maintenance of the centerboard and ketch rigging adds complexity.
Measurements
Construction & Hull
- Construction Material
- Wood
- Hull Type
- Monohull Sailboat
- Keel Type
- Fin
- Rudder
- 1x —
- Ballast
- 2500 lbs (Lead)
- Displacement
- 5017 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 28.5 ft
- Waterline Length (LWL)
- 18.5 ft
- Beam
- 7.5 ft
- Draft
- 4.75 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Fractional Sloop
- P (Main Luff)
- 37.5 ft
- E (Main Foot)
- 19.2 ft
- I (Foretriangle Height)
- 22.8 ft
- J (Foretriangle Base)
- 8.25 ft
- Forestay Length (est)
- 24.25 ft
- Sail Area
- 407 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 22.22
- Ballast / Displacement Ratio
- 49.83
- Displacement / Length Ratio (D/L) Ratio
- 353.74
- Comfort Ratio
- 24.62
- Capsize Screening Formula
- 1.75
- Hull Speed
- 5.76 kn