Nicholson 30 Mk I Information, Review, Specs

Sailing Performance & Handling

The sailing characteristics of the Nicholson 30 Mk I are deeply influenced by the IOR design philosophy of the early 1970s. It features a high-aspect masthead sloop rig and a hull shape characterized by a relatively narrow waterline and significant "tumblehome" (where the hull narrows at the deck level). In light to moderate airs, the boat is surprisingly nimble, benefiting from a generous sail area-to-displacement ratio that allows it to point high and maintain momentum through tacks.

However, like many IOR designs with a pinched stern, the 30 Mk I can become challenging when sailing downwind in heavy seas. Owners often report a tendency toward "death rolls" if over-canvassed in a following sea, as the hull lacks the broad aft sections of modern designs to provide buoyancy and stability when surfing. Under the guidance of the Nicholson Owners Association, members frequently share insights on reefing early to maintain balance. The boat tracks exceptionally well upwind, providing a "big boat" feel and a sense of security that belies its thirty-foot length. The deep fin keel and skeg-hung rudder offer a level of directional stability that makes it a more relaxing coastal cruiser than the lighter, spade-rudder racing yachts of the same era.

Interior Comfort & Variations

The interior of the Nicholson 30 Mk I reflects the yard's transition from traditional woodcraft to production fiberglass, yet it retains a high level of finish. The layout is a classic "five-berth" configuration: a V-berth in the forward cabin, a saloon with a settee that converts into a double or single berth, and two generous quarter berths extending aft under the cockpit. Unlike modern "open plan" interiors, the 30 Mk I feels compartmentalized and seaworthy, with plenty of handholds and a galley that is usable even when the boat is heeled.

Headroom is approximately 5' 10" in the main saloon, which was considered generous for a 30-foot performance boat in 1971. The joinery is typically finished in teak or mahogany veneers, providing a warm, traditional aesthetic. There is a dedicated heads (bathroom) compartment located between the saloon and the forward cabin, usually featuring a marine toilet and a small pull-out washbasin.

While the Mk I is the most common version, Camper & Nicholsons eventually released the Nicholson 30 Mk II. The Mk II featured a revised deck molding with a more streamlined coachroof and a slightly modified mast position to improve the IOR rating and balance. A few "stripped out" racing versions were also produced, which lacked the full wooden interior to save weight for Half Ton Cup competition.

Known Issues & Buyer’s Checklist

Prospective buyers of a Nicholson 30 Mk I should focus on several era-specific technical areas. While the hulls are solidly built, they are of an age where maintenance history is paramount.

• Osmosis: Like many GRP boats from the early 1970s, the Nicholson 30 Mk I is prone to osmotic blistering. While rarely structural on a boat built to C&N standards, a professional survey is required to determine the extent of moisture in the laminate.
• Chainplate Anchoring: The chainplates on some early models were anchored to wooden knees or bulkheads. Over decades, water ingress through the deck gland can cause rot in these structural members, potentially compromising the rig’s tension.
• Engine Access and Age: Many Mk I boats were originally fitted with the Volvo Penta MD series or small Yanmar diesels. Given their age, many have been repowered. Buyers should prioritize boats with modern freshwater-cooled engines, as access for maintenance—located primarily behind the companionway steps—can be cramped.
• Mast Step Compression: The mast is deck-stepped, supported by a compression post that transfers loads to the keel. It is vital to check for any deformation in the deck molding around the mast foot or any "sinking" of the compression post into the cabin sole.

Community & Resources

The primary hub for technical data and social connection is the Nicholson Owners Association, which maintains an extensive archive of original brochures and technical drawings for the Nicholson 30 series. This group is instrumental in helping owners source rare parts and providing guidance on modernizing the rig or interior while maintaining the vessel's classic character.

The Verdict

The Nicholson 30 Mk I is a "sailor's sailboat," offering a level of build quality and pedigree that is difficult to find in contemporary 30-footers. While its IOR-influenced hull shape requires an attentive hand on the helm during downwind runs, its upwind performance and sea-kindliness make it an excellent choice for coastal racing or spirited cruising.

Pros:

• Exemplary build quality from a world-renowned shipyard.
• Excellent upwind performance and pointing ability.
• Timeless, classic aesthetics with high-quality interior joinery.
• Strong secondary market value due to the Camper & Nicholsons name.

Cons:

• Requires early reefing to manage IOR-related "flightiness" downwind.
• Interior volume is significantly less than modern 30-foot cruisers.
• Ongoing maintenance is required for a 50-year-old GRP hull and rig.