Production continued into the mid-1980s. Although the Sonic 23 is now out of production, its uncomplicated design has kept examples in recreational use.
Design and Construction
The Sonic 23 was built predominantly of fibreglass, with simple, solid fiberglass construction and some wood trim for finish. Neither the hull nor the deck is cored, so the structure is a straightforward solid layup.
The boat measures 23 feet overall and 20 feet on the waterline, with a 7.58-foot beam. Displacement is 3,400 pounds, including 1,500 pounds of iron ballast. Those figures make it compact but reasonably weighted for its length.
A fixed fin keel and transom-hung rudder give the Sonic 23 an underbody typical of its era. The pop-up companionway hatch is the one clever accommodation feature in an otherwise plain structure.
Rig and Handling
The masthead sloop rig has an I dimension of 27 feet, J of 10 feet, P of 23 feet, and E of 9.50 feet. Its sail plan suits light trailerable cruising rather than racing ambition.
The fin keel and transom-hung rudder provide predictable handling at low speeds. Maximum draft is 3.75 feet, which helps keep trailering and anchoring in shallow water practical. An average PHRF racing handicap of 228 puts the Sonic 23 among the slower-rated pocket cruisers, consistent with a boat designed for ease rather than speed.
Accommodations
Below, the Sonic 23 provides basic accommodations for four. Its standout feature is the pop-up cabin section, which increases headroom to about 6 feet 1 inch. That’s a genuine benefit in a 23-footer, where sitting headroom is often the best a crew can expect.
The outboard well and provisions for an outboard motor also reflect the boat’s daysailer-cruiser purpose. They keep the machinery simple and allow it to be serviced from the cockpit rather than buried in a confined compartment.
Equipment and Power
The boat is commonly paired with a small motor such as a 9.8 hp Tohatsu mounted in the outboard well. This provides enough power to stem a current or dock in calm conditions without adding the weight and complexity of an inboard engine.
When the boat is parked, the pop-up companionway hatch serves as both an accommodation extender and a ventilation aid.
Verdict
The Sonic 23 is an unapologetically simple pocket cruiser: modest in performance, plain in construction, and practical in layout. Its main strengths are trailerability, straightforward solid-fiberglass construction, and a pop-up cabin that makes weekends aboard with four people more bearable. Its limitations include a slow handicap rating, basic fit and finish, and a small rig unlikely to excite a racer.
Pros
- Simple, solid fiberglass construction with wood trim
- Pop-up cabin section providing about 6 feet 1 inch of headroom
- Trailerable size, 3.75-foot draft, and an outboard well
- Basic accommodations for four in a 23-foot hull
Cons
- Average PHRF handicap of 228 indicates modest speed
- Basic accommodations and trim rather than the finish of a refined cruiser
- Out of production since the mid-1980s
