Design and Construction
The Dean 5000 measures 50 feet 6 inches overall, with a beam of 26 feet 3 inches and a displacement of 39,683 pounds spread across twin hulls. Her mast stands 78 feet 9 inches above the waterline.
The hulls and deck are solid fiberglass with an iron ballast. The builder also employed very lightweight construction materials, including a high-density foam core assembled with vacuum-infused epoxy resin. This light building method is the stated reason the sail plan delivers impressive performance: reduced mass lets the catamaran accelerate and carry sail easily.
The 5000 was built to category A certification, an offshore-standard rating that the period review tied directly to her guaranteed performance envelope. Dean’s house style at the time included asymmetrical hulls and an aft-raked mast, and the 5000 follows that lineage. Her displacement-to-length ratio is 144.31, while her sail-area-to-displacement ratio is 21.02. Those figures place her firmly among lively cruising cats rather than heavy voyagers.
Rig and Handling
Although described as a fractional-sloop catamaran, the Dean 5000’s working rig is a solent arrangement. A self-tending staysail handles the inner slot, while a very large jib drives the boat upwind and on reaches. For downwind sailing, a gennaker of 1,561 square feet can be deployed.
The mainsail measures 1,076 square feet, giving this 50-foot cat a generous sail inventory. The mainsheet traveler is anchored to the cockpit arch rather than a bridge-deck track, keeping the coachroof clear and the helm sightlines open. Multiple sail-plan permutations were offered, and the review record notes that these options produced extremely impressive sailing statistics for a cruising platform of this size.
Accommodations and Systems
Below, the interior offers plenty of space and daylight, helped by the 26-foot beam and the design’s large areas of glazing. The overall presentation is elegant and modern, with the volume and light associated with contemporary cruising catamarans.
The layout provides three cabins with six double berths, making it suitable for either a large family or a charter program. Freshwater and fuel are carried in paired 395-liter tanks each, providing 209 gallons of water and 209 gallons of diesel. A pair of 65-horsepower engines handles maneuvering and charging.
Construction and Rig Considerations
The lightweight foam-core, vacuum-infused epoxy construction is a known care point. Core moisture or impact damage calls for specialist repair rather than conventional fiberglass work. The structure also argues for careful grounding avoidance and professional assessment of any suspected core issue.
The solent rig’s overlapping headsails and arch-mounted traveler introduce more lead and hardware than a simple sloop. The cockpit-arch attachment should also be inspected with its mainsheet loads in mind.
Refits and Ownership
Systems upkeep follows familiar catamaran practice. The twin 65-horsepower diesels require dual-engine servicing, while the paired tank sets call for symmetrical monitoring. Owners also need to include the arch-based rig and its mainsheet attachment in routine inspections.
The Verdict
The Dean 5000 is a beamy, light-displacement South African catamaran built to offshore category A standards. Her solent rig and arch-mounted traveler prioritize sailing performance, clear decks, and open helm sightlines. The three-cabin, six-double-berth interior and paired tanks suit extended cruising or charter use. However, the foam-core epoxy construction and more complex rig warrant an informed survey.
Pros
- Lightweight vacuum-infused epoxy and foam-core construction that aids performance
- Category A certification for offshore use
- Solent rig with a self-tending staysail and an arch-anchored mainsheet traveler
- Three cabins, six double berths, and 209 gallons each of water and fuel
Cons
- Lightweight core construction requires specialist repair if damaged
