With a displacement of 21,500 pounds and 9,000 pounds of lead ballast, the Offshore 40 falls into the moderate-weight class. Her ballast-to-displacement ratio of 41.86 percent helps explain her reputation as a very stable, stiff boat with good righting capability if capsized. She has a capsize ratio of 1.91 and a comfort ratio of 29.25. Together, those figures point to a secure platform for sailing close to shore rather than a bluewater voyager.
Design and Construction
The Offshore 40 is a fiberglass monohull with a fin keel and spade rudder. Both the hull and deck are solid fiberglass rather than cored.
Her waterline measures 35 feet, and maximum draft is 5.16 feet. The resulting hull speed is 7.93 knots. A displacement-to-length ratio of 223.87 places her firmly among moderate-weight cruisers. Her 13.25-foot beam, combined with the lead ballast, contributes to the stiffness noted in period data.
The fin-keel and spade-rudder arrangement favors maneuverability in coastal waters over offshore robustness.
Rig and Handling
The Offshore 40 carries a masthead sloop rig with a 100-percent sail area of 740 square feet. That total comprises a 290.25-square-foot mainsail and a 450-square-foot foretriangle. Air draft is 54.50 feet.
The rig dimensions—an I measurement of 50 feet, J of 18 feet, P of 43 feet, and E of 13.50 feet—describe a conservative sloop plan. With a sail-area-to-displacement ratio of 15.37 and moderate displacement, the boat was considered slightly under powered in a period assessment. Stability and righting ability remain her strengths, but she is better suited to coastal cruising than long passages.
Accommodations and Tankage
The specification record lists zero cabins, zero berths, zero heads, and zero headroom. These are absent data fields, not evidence that the Offshore 40 was supplied as a bare shell, so the interior layout cannot be characterized from the available information.
The boat carries 150 gallons of water, described as a good supply range, and 75 gallons of fuel, considered average for the class. Auxiliary power comes from a single 50-horsepower Ford Lehman diesel.
The Verdict
The Offshore 40 is a rare, short-run Canadian coastal cruiser. Her main virtues are stiffness, secure righting behavior, and practical tankage for near-shore sailing. With only 14 hulls built, she’s an uncommon find. The slightly under-powered sail plan is the main performance caveat, set against otherwise reassuring stability figures.
Pros
- Very stable and stiff, with good capsize-righting capability
- Solid fiberglass hull and deck construction
- Generous 150-gallon water capacity for coastal use
- Secure 41.86 percent ballast-to-displacement ratio
Cons
- Slightly under powered, according to a period assessment
- Only 14 built, limiting market availability
- Better suited to coastal cruising than offshore work
