Hull Form and Deck Layout
The 500's underbody reflects careful thinking about catamaran motion at sea. The waterline entry forward combined with the long waterline aft and wide beam produces a more sea-kindly motion than bluffer hull forms, and the underbody shape directs waves downward so the wake from both hulls meets well aft, reducing bridgedeck slamming — a vice that plagues many cats of this size. Observers have noted the boat sits relatively low in the water compared to some competitors, but slamming complaints from owners appear to be uncommon, a likely result of that sculpted underbody geometry.
On deck, wide side decks make movement forward feel secure in a seaway, though non-flush deck hatches are a minor criticism. A teak catwalk with built-in chain guides gives the foredeck crew a stable platform during anchoring. The solid transom wall across the aft cockpit keeps boarding seas out — a meaningful detail on a boat expected to cover serious ocean miles.
Rig, Handling, and Shorthanded Capability
The entire sail plan has been organized around two-person or single-handed operation. All halyards and reef lines run back along the deck to the helm, and the genoa roller furling is within reach of the seated helmsman. The 500 carries an 800 square foot full-roach mainsail with a Harken Battcar system that allows the sail to drop cleanly onto the boom, paired with a 538 square foot genoa. A screecher on a furler mounted to a bowsprit handles light-air reaching and, when combined with the genoa deployed on the opposite side, gives the boat a wing-on-wing downwind mode that moves her in as little as six knots of apparent wind.
The helm position is a single bulkhead starboard station under a hard top bimini with an overhead window for sail visibility, giving the helmsman sight lines to all four corners of the boat. Twin 57 hp Yanmar diesels with saildrives provide adequate power for the boat's windage, and single-lever throttles make close-quarters docking manageable for a shorthanded crew. The low boom position on the coachroof keeps drive low in the rig, which benefits stability when pressed in a breeze. Rig placement allows sailing across a wider variety of wind angles than some cats allow — a useful characteristic for real-world ocean routing.
Cockpit and Entertaining
The aft cockpit is where Knysna's South African sensibility shows most clearly. A swim platform between the aft bench and the davit structure simplifies dinghy handling at anchor, and custom lifting tackle extends from the boom to secure the dinghy on chocks rather than swinging davits — a more offshore-appropriate arrangement. A barbecue grill is neatly positioned on the starboard swim platform with its own aft-facing seat, while a filleting table and second aft-facing seat occupy the port side for serious fishermen. The teak dining table forward of the aft sofa bench, along with the option to lower that bench into a day bed, gives the cockpit genuine social versatility. A clear enclosure rolls down over the helm area for protection in deteriorating weather.
Accommodations and Liveaboard Systems
Interior finish quality is where the 500 most clearly separates itself from production boats. Cabinetry, catches, and general carpentry throughout are well above what volume builders deliver, and the layout has been planned with genuine liveaboard use in mind rather than boat-show appeal alone.
In the owner's hull, a custom-fit double berth aft is followed by bench seating and an office area amidships, with a large standing shower stall and ladies' vanity aft of a watertight bulkhead. A dedicated machinery room provides organized access to the generator, watermaker, and associated systems, with sea strainers installed so any spill drains harmlessly into the bilge. The starboard hull offers two guest cabins each with en-suite heads; the forward cabin also has its own shower and access through a watertight bulkhead to a washing machine compartment.
Ventilation has been carefully designed so deck hatches draw air through to side-opening portlights, with dedicated airflow paths through the showers and heads — a detail that matters enormously in tropical anchorages. Standard equipment includes a 6 kW generator, a 1,260 amp-hour house battery bank, a 3,000-watt inverter/charger, watermaker, reverse-cycle air conditioning and heat, as well as 158.5 gallons each of fuel and water. Side windows at the master berth look out to the water — a small thing that makes a meaningful difference in extended liveaboard comfort.
The U-shaped galley is secured for offshore cooking, and additional refrigeration is located below in the starboard hull. Storage throughout is exceptional — Knysna has used virtually every available cubic foot in the hulls, an accomplishment that owners of lesser boats tend to appreciate most keenly after their first passage.
Known Considerations
The Knysna 500 does not present obvious structural or design deficiencies in the available literature — a reflection of its boutique production pace and the attention that small-batch building allows. A few practical notes are worth flagging. The helm area's layout, while excellent for sailing, requires stepping down and around to move forward quickly — a trade-off inherent to the protected single-helm arrangement. Non-flush deck hatches are a minor criticism some buyers will flag as a cosmetic or water-ingress concern depending on preference. The saloon's forward-facing light is limited by the molded steps connecting the foredeck to the coachroof, leaving the interior somewhat dependent on the overhead hatches for natural light. Neither issue rises to the level of a systemic problem, but both are worth examining on any specific hull before purchase.
Refit and Ownership Considerations
Knysna has designed the 500 with the owner-operator in mind from the outset. Engine access can be configured either under the berth or through a deck hatch aft, providing a generously sized workspace for servicing the Yanmar diesels and hydraulic steering — a choice that reflects the yard's awareness that the people who buy these boats will be maintaining them themselves in remote anchorages. The standard equipment package is unusually complete compared to volume production boats, which means new owners spend less time chasing aftermarket upgrades and more time sailing. Given the semi-custom nature of the build, owners who want alternative configurations — nav station placement, machinery room arrangements, or layout variations — have historically been able to work with the yard on options.
The Verdict
The Knysna 500 makes a coherent case for boutique South African catamaran building. It is not a performance machine, and it does not try to be — it is a bluewater liveaboard designed to carry a couple to distant anchorages in safety and comfort, then keep them comfortable once they arrive. The finish quality, the practical details, and the thoughtfulness evident throughout the design all point to a builder that actually sails.
Pros
- Interior finish and cabinetry quality meaningfully above production catamaran standards
- Shorthanded sail plan with all controls at the helm, screecher, and wing-on-wing capability
- Hull form and transom wall reduce slamming and boarding seas
- Dedicated machinery room, accessible engine bays, and liveaboard-grade standard systems
- Exceptional storage utilization throughout both hulls
- Generous standard equipment package reduces post-purchase outfitting expense
Cons
- Helm layout requires stepping down and around to reach the foredeck in a hurry
- Non-flush deck hatches a minor cosmetic and practical compromise
- Saloon natural light is limited by the foredeck-to-coachroof step geometry
- Boutique production pace means finding specialized parts and warranty support offshore requires planning
