Design and Construction
Bruce King gave the Independence a double-ended "canoe" stern and a long fin keel paired with a transom-hung rudder. The underbody is defined by that long fin and the transom-hung rudder, which eliminates the need for a rudder post and stuffing box inside the boat anchor, making the pintles and gudgeons easy to inspect and maintain at sea. Unlike an internal rudder, all components—the gudgeons, pintles, and the tiller head—are visible and accessible. The canoe stern further enhances safety: in a following sea, waves split and move past the hull rather than lifting the stern and causing a broach. At 11,700 lbs displacement with 4,500 lbs of lead ballast and a 38% ballast-to-displacement ratio, the boat is stiff and provides a safe, upright sailing experience, while a capsize screening value of 1.87 sits well under the 2.0 safety limit for offshore work.
Rig and Handling
Most Independence boats were rigged as cutters, with a few sloop variants in the fleet. The cutter arrangement was chosen so the boat could be easily managed from the cockpit, breaking the sail area into smaller, more manageable pieces. The numbers bear this out: a 215 ft² mainsail and a total sail area of 513 ft² on a 15.9 sail-area-to-displacement ratio give moderate sail power that excels in 15 knots or more. With a displacement-to-length ratio of 382, the hull is heavy, with high momentum and storage capacity; it will not surf or plane, but it tracks with a steady persistence lighter hulls cannot match. A comfort ratio of 35.4 is very high and ensures a predictable, easy motion at sea, and the design is judged capable of handling significant sea states due to its weight and high limit of positive stability.
Accommodations
Below, the Independence feels larger than its 31-foot length suggests, primarily due to the 10'6" beam. The layout is traditional: a V-berth forward, followed by a head and hanging locker. The main saloon features a settee and a pilot berth, and the galley is usually U-shaped and located near the companionway. Water capacity runs to about 50 gallons with fuel around 20 gallons, modest figures for extended cruising. The cockpit is deep and secure, protected by a large bridge deck designed to keep water out of the cabin.
Known Issues
Prospective owners should note the transom gudgeon mounting points on the stern post deserve inspection for stress cracks. Deck delamination is a known concern focused on the balsa core around the bowsprit and the mast step. Rotting structural plywood where the chainplates attach is a critical issue. Many older units still carry their original Universal engines.
Refits and Ownership
The transom-hung rudder's external hardware is a practical advantage for the owner who voyages far, since worn pintles or gudgeons can be assessed and serviced without hauling or cutting into the hull. The encapsulated lead ballast avoids the maintenance exposure of bolt-on keel lead, and the solid fibreglass hull construction is straightforward to survey. The cutter rig's divided sail plan also lends itself to modest, useful upgrades in sheet travel and reefing without disturbing the boat's essential character.
The Verdict
The Ericson 31 Independence is a deliberately old-fashioned blue-water cruiser: heavy, stiff, forgiving, with a canoe stern and external rudder that prioritize safety and serviceability over pace. It is a boat that tracks with stubborn persistence rather than sparkle, and its accommodations are roomy for the length without pretending to be a larger vessel.
Pros
- High ballast-to-displacement ratio and capsize screening under 2.0 for offshore use
- Transom-hung rudder with fully visible, maintainable hardware
- Canoe stern splits following seas for broach resistance
- Roomy interior for a 31-footer thanks to the 10'6" beam
Cons
- Modest tankage and moderate sail power limit range and light-air performance
- Balsa-core deck and chainplate plywood are known failure points
- Heavy displacement means it will not surf or plane
