Design and Construction
Rethana Yachts laid up the hull and deck in solid fiberglass, and the underbody carries a monohull keel with a centerboard — a configuration that lets the boat sit at a shoal 2.30-foot draft with the board up and reach 3.94 feet when fully lowered built in fiberglass by Rethana Yachts since 1979. The 38.66 percent ballast-to-displacement ratio and 144.45 displacement-length ratio describe a hull that is slender for its length and firmly weighted for a boat of 24.93 feet, while the 22.31-foot waterline supports a theoretical hull speed of 6.33 knots. Germany is the country of origin, and the build approach is straightforward solid-glass rather than cored laminate.
Rig and Handling
The masthead sloop rig carries 269 square feet of sail on the 100 percent basis, and the resulting sail-area-to-displacement ratio of 18.40 marks her as a good performer in the light-displacement class. Reviewers describe the Rethana 25 as stable or stiff, and the same assessment notes a low righting capability if capsized — a trade-off typical of a light day-sailer with modest beam at 8.20 feet. The capsize screening value of 2.14 and a comfort ratio of 14.58 reinforce the picture of a boat tuned for sheltered-water sailing and short-handed ease rather than offshore passage work.
Accommodations
The Rethana 25 has no cabins, berths, heads, water capacity, or standing headroom in her specification, and she is best suited as a day-boat. That absence of interior accommodation figures is consistent with the design brief: she is an open-plan small sailer meant for outings rather than overnight cruising.
Known Issues
The single engine listed shows zero horsepower and zero fuel capacity, which reflects the day-boat specification.
Refits and Ownership
Ownership centers on a simple fiberglass hull with a centerboard trunk and a single-engine installation of unspecified make. The light displacement and shoal-draft flexibility suit the design's day-sailing role, but the low righting capability after a capsize is a handling reality owners should respect in breeze.
The Verdict
The Rethana 25 is a purpose-built German day-sailer: light, stiff, and quick under a masthead rig, with a centerboard that broadens her cruising grounds beyond what a fixed-keel 25-footer allows. She is not an overnight cruiser, and her righting behavior demands respectful seamanship, but as a daysailer she is a coherent, well-balanced design.
Pros
- Light, good-performing masthead sloop with a 18.40 sail-area-to-displacement ratio
- Centerboard hull gives 2.30-foot shoal draft and 3.94-foot maximum draft
- Solid fiberglass construction from a defined 1979 German production run
Cons
- Low righting capability if capsized
- No cabin, berth, head, or water capacity — day-boat only
