Design Brief & Intent
The design brief for the Moorings 4500 was centered on maximizing safety, structural reliability, and ease of maintenance without sacrificing sailing capability. Unlike many modern catamarans that rely on massive, boxy cabins with vertical front windows, Simonis & Voogd opted for a sleeker, more aerodynamic coachroof profile with sloped windows and integrated steps for mast access. To eliminate the structural weight and visual obstruction of a traditional solid bulkhead in the saloon, the designers engineered an innovative "H-frame" stainless steel structural support system. This frame sits embedded in the cabin sole and coachroof, distributing the mast loads directly to the bridge deck and hull bulkheads. Inside, the cabin is fitted out with high-quality woodwork, typically finished in light birch, which gives the saloon a bright, airy feel. The galley-up configuration puts the cook on the same level as the entertaining areas, while the large saloon window provides excellent panoramic visibility. This robust build philosophy and high-quality joinery set the Moorings 4500 apart from its European competitors of the era, which often utilized lighter, more flexible interior liners.
Variations & Configurations
To cater to different markets, the Moorings 4500 was offered in distinct layouts. The charter-configured Moorings 4500 featured a highly efficient four-cabin, four-head layout. In this arrangement, each hull contains two symmetrical double berths, each with its own en-suite head and shower, maximizing privacy for up to eight guests. For private buyers, Robertson & Caine built the vessel as the Leopard 45 in a three-cabin "Owner's" configuration. This layout dedicates the entire starboard hull to a master suite, featuring a large double bed aft, a central writing desk or vanity with lounge seating, and an exceptionally spacious head compartment forward. Standard across all variations is a fractional sloop rig featuring a heavy-section aluminum mast supported by swept-back spreaders. Crucially, the boat utilizes robust shaft-drive propulsion rather than sail-drives, paired with twin low-aspect-ratio skeg keels that protect both the rudders and the propellers. This configuration allows the vessel to safely dry out on a sandy bottom or be parked on its hulls without risking drivetrain damage.
Sailing Performance & Handling
On the water, the Moorings 4500 defies the "sailing condominium" stereotype of modern cruising catamarans. With a Sail Area to Displacement (SA/Disp) ratio of 21.33 and a relatively light displacement of 27,981 pounds, the vessel behaves nimbly in light air and carries its canvas with remarkable stability in heavy weather. The Displacement to Waterline Length (Disp/LWL) ratio of 167.64 reflects narrow, easily driven hulls below the waterline, which translates to a smooth helm response and a lower overall drag compared to wider-hulled catamarans of similar volume. At the helm, which is located on a raised starboard platform under a hard bimini, visibility is exceptional. The boat’s Comfort Ratio of 14.37 and Capsize Screening Formula of 3.21 emphasize its wide-beam stability (with a beam of 24.3 feet) and a predictable, dampened motion in a seaway. However, the early design compromises of this era are evident in the bridgedeck clearance. With a lower bridgedeck than its modern successors, the classic Moorings 4500 is susceptible to wave slamming when beating directly into short, steep head seas. Experienced owners quickly learn that falling off the wind by a few degrees dramatically improves ride comfort and preserves speed.
Market Snapshot & Economics
Decades after rolling off the Cape Town production lines, the classic Moorings 4500 occupies an incredibly strong position on the secondary market. It is widely regarded as one of the best "bang-for-the-buck" blue-water cruising catamarans available. Because most of these vessels have phased out of their initial charter contracts, the majority are now privately owned and have been modified for long-term cruising. While they trade at a relative value compared to younger, beamier catamarans, they command a premium over less-proven multihulls of the same age due to their legendary South African build quality. Prospective buyers should budget for typical post-charter or aging-system refits. Common economic considerations include replacing aged electronics, upgrading outdated plumbing, and addressing cosmetic gelcoat crazing. However, because the fundamental hull structure and shaft-drive mechanics are incredibly stout, the economics of refitting a classic Moorings 4500 are highly favorable, as the boat’s enduring reputation supports strong resale value.
Known Issues & Triage
Despite its stellar reputation, the classic Moorings 4500 has a few documented trouble areas that require careful inspection. The primary concern is the lower bridgedeck clearance, which causes persistent slamming under power or sail in choppy upwind conditions; while not a structural failure, it is a comfort issue that requires active routing and sail trimming to manage. On deck, the original acrylic saloon windows are prone to leaking due to UV degradation of the adhesive sealant. Over time, the sealant dries out and allows water to seep into the saloon liner. The standard triage for this is to completely pull the windows, grind back the old bonding agents, and re-bed them using high-grade marine polyurethanes, with some owners opting to replace the acrylic with tempered marine glass. The trampoline nets are another high-wear item, and original nets should be scrutinized for UV rot and replaced with modern, durable polyester mesh. Finally, the H-frame stainless steel mast support should be inspected for crevice corrosion, particularly where the stainless steel meets the aluminum or composite structures, though catastrophic failures of this frame are virtually unheard of.
Modernization & Upgrades
The solid bones of the Moorings 4500 make it a premier candidate for modern cruising upgrades. One of the most popular retrofits among liveaboard cruisers is the installation of high-capacity Lithium Iron Phosphate (LiFePO4) battery banks. These installations are typically paired with massive solar arrays. Because the original aft bimini and arch structure are robust, they provide an ideal framework for custom aluminum solar arches capable of supporting over 1,000 watts of solar panels, allowing owners to run electric galley appliances and watermakers without relying on a diesel generator. Another highly ambitious but proven modification is the "sugar scoop extension". Some owners have extended the transoms by two feet, effectively lengthening the waterline to 47 feet. This modification mimics the design of the subsequent Leopard 47, significantly reducing aft hobby-horsing, improving speed under sail, and providing easier boarding access from a dinghy. Owners also frequently upgrade the standard battened mainsail to a modern square-top mainsail to capture cleaner air aloft and enhance light-wind performance.
The Verdict
The classic Moorings 4500 is a rare breed of cruising catamaran that successfully bridges the gap between commercial-grade durability and genuine sailing performance. Designed in an era before "charter boats" were optimized solely for dockside living, this Simonis & Voogd creation retains narrow, fast hulls and a powerful rig that will delight sailors who still care about helm feel and pointing angles. While the lower bridgedeck clearance demands compromises in heavy head seas, the boat's overall structural integrity, skeg-protected running gear, and robust shaft-drive layout make it an incredibly safe and forgiving vessel for global circumnavigation. For cruisers seeking a capable, offshore-ready multihull without the premium price tag of a brand-new build, the classic Moorings 4500 remains one of the most intelligent choices on the brokerage market today.
Pros:
- Robust South African construction designed for demanding blue-water delivery voyages.
- High-performance sail plan and narrow hull profiles provide excellent speed and helm response.
- Skeg-protected rudders and traditional shaft drives offer superior mechanical reliability over sail-drives.
- Highly favorable refit economics and strong, enduring resale value.
- Innovative stainless steel H-frame eliminates bulky bulkheads, creating an open and bright saloon.
Cons:
- Low bridgedeck clearance leads to significant wave slamming when sailing close-hauled.
- Slower speed under power compared to modern, flatter-bottomed hull shapes.
- Most available brokerage models have extensive charter histories requiring system overhauls.
- Sloped saloon windows create more greenhouse heat compared to modern vertical window designs.
