Coronet 25 — Information, Review, Specs

J. Brooke·1972·Salthouse Bros. Ltd.
Coronet 25 drawingBuilder drawing
Hull type
Monohull · centerboard
Rig
Masthead Sloop
LOA
25' · 7.62 m
Displ.
2,954 lbs · 1,340 kg
First year
1972

The Coronet 25 occupies a foundational place in the history of New Zealand’s fiberglass boatbuilding revolution. Designed by the prolific Bob Salthouse and manufactured by Custom Glass Boats (the precursor to the renowned Cavalier Yachts), this vessel was a pioneer of the "powertrailerable" sailing movement in the early 1970s. At a time when recreational sailing was shifting from traditional timber to productionline GRP, the Coronet 25 offered a compelling mix of coastal capability and roadlegal mobility. It was developed alongside its smaller sibling, the Coronet 20, to provide a stepup option for families who required more interior volume and stability than the smaller dinghybased designs of the era could offer. The design reflects the Salthouse Marine philosophy of combining clean, seaworthy lines with a practical, nononsense interior, a pedigree that later birthed the legendary Cavalier 32.

Measurements

Dimensions 01

LOA
25 ft
LWL
20.01 ft
Beam
8.17 ft
Draft
4.49 ft
Max headroom
-
Air draft
28 ft

Construction & hull 02

Construction
Fiberglass
Hull type
Monohull
Keel type
Centerboard
Rudder
1× —
Ballast
983 lbs (Lead)
Displacement
2954 lbs
Water
-
Fuel
-

Rig & sails 03

Rig type
Masthead Sloop
P · main luff
-
E · main foot
-
I · fore ht.
-
J · fore base
-
Forestay (est)
-
Sail area
204 sqft

Calculations 04

SA/D ratio
15.85
Ballast/Disp.
33.28
D/L ratio
164.6
Comfort ratio
12.93
Capsize screening
2.28
Hull speed
5.99 kn

Sailing Performance & Handling

The Coronet 25 is characterized by a high level of initial stability for a trailerable yacht, largely due to its generous beam and the strategic placement of its ballast. As a swing-keel design, it features a heavy galvanized steel centerboard that can be retracted for shallow-water exploration or trailering. This configuration allows the boat to perform admirably on a reach, though like many trailer sailers of its vintage, it lacks the extreme pointing ability of a deep-keeled racing yacht.

In terms of sea-kindliness, the Coronet 25 is frequently cited by owners as a "stiff" boat that handles the choppy conditions of New Zealand’s Hauraki Gulf with composure. The hull features a moderately fine entry that transitions into a flat exit, which helps the boat maintain speed in light airs—a common design trait in Bob Salthouse’s work. While it is not a high-performance racing machine, the Coronet 25 is noted for its predictable tracking. It does not suffer from the "skittish" behavior found in lighter, modern trailer sailers, making it an excellent platform for those transitioning from dinghies to keelboats.

Interior Comfort & Variations

For a 25-foot vessel designed in the 1970s, the Coronet 25 was remarkably ambitious in its interior packaging. The cabin utilizes a "pop-top" roof—a hallmark of that era—which provides full standing headroom in the galley and saloon area while at anchor. This feature was a significant selling point, as it allowed the boat to maintain a low profile for towing while offering the amenities of a larger cruiser once the top was raised and the canvas side-curtains were secured.

The standard layout typically includes a V-berth forward, a compact head (often a chemical toilet housed under the cushions), and a main saloon with a dinette that converts into an additional double berth. Opposite the dinette, a small linear galley provides a sink and a two-burner stove. The use of timber trim against the white GRP liner was a signature Cavalier/Salthouse touch, aimed at providing a warmer, yacht-like feel than the sterile plastic interiors of competing production models. Sibling variants are limited, though some owners have modified the interior to remove the dinette in favor of longer settee berths for better offshore sleeping arrangements.

Known Issues & Buyer’s Checklist

Prospective buyers of a Coronet 25 should focus their inspection on the specific mechanical systems inherent to 1970s trailer sailers. The most critical area is the swing-keel assembly. Over decades, the pivot pin and the keel trunk itself can suffer from wear, leading to a "thumping" sound while underway or, in worst-case scenarios, a jammed centerboard. It is essential to inspect the lifting winch and cable for fraying or corrosion.

The "pop-top" mechanism is another high-signal area for inspection. The gas struts (if retrofitted) or the manual stainless-steel supports can fail, and the waterproof canvas sleeve often requires replacement every 10–15 years due to UV degradation. Furthermore, buyers should check the deck for soft spots, particularly around the mast step and the chainplates. Like many early GRP boats, these areas are prone to moisture ingress if the sealant has been neglected. Finally, because these boats were often powered by long-shaft outboards on transom brackets, the integrity of the transom and any signs of stress cracking around the motor mount should be closely examined.

Community & Resources

Owners of the Coronet 25 are often integrated into the broader Cavalier and Salthouse communities. While there is no dedicated standalone website for the Coronet 25, technical support and historical documentation are frequently found through the Cavalier Yacht Owners Association. This group maintains a wealth of knowledge regarding the construction techniques used at the Custom Glass Boats factory and can provide guidance on sourcing original hardware or managing GRP repairs specific to the Salthouse designs of that period.

The Verdict

The Coronet 25 remains a highly respected entry-level cruiser for sailors who value heritage and solid construction over modern racing performance. It is a robust "all-rounder" that successfully bridges the gap between a dayboat and a coastal cruiser.

Pros:

  • Proven Salthouse hull design offers excellent stability and seaworthiness.
  • Pop-top roof provides surprising headroom for a trailerable boat.
  • Heavy GRP construction is more durable than many contemporary lightweight trailer sailers.
  • Strong resale value within the New Zealand and Australian markets.

Cons:

  • Swing-keel maintenance can be labor-intensive and requires regular inspection.
  • The 25-foot length and ballast weight require a substantial vehicle for safe towing.
  • Aged interior liners and canvas often require cosmetic and functional updates.

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