Knysna 500 - Owner's version


Light, quick, and robust, the Knysna 500SE is the ultimate in comfort, luxury, and performance, an international benchmark in catamaran standards.

Quality craftsmanship from renowned boutique manufacturer Knysna Yacht Company – South Africa.

Exquisite finish and attention to detail in every way comparable to the quality standards of a superyacht.

Knysna yachts have been nominated for the 2019 & 2020 Multihull of the Year

Osa is presented to rival a new Knysna 500 and equipped for luxurious cruising and independence at sea for long period of time.

Fast and incredibly comfortable. Excellent upwind performance.

Extremely strong and purposely built for unlimited ocean cruising in all latitudes and weather conditions. 

Owners’ version with port hull entirely reserved to the owner’s private use

Two guest staterooms, each with their own bathroom

Reverse cycle air conditioning with independent private controls

New rigging (Sparcraft) 2019

New sails in 2020. Beautiful condition.

Set up for short-handed sailing with 2 electric primary winches (Harken Radial)

Full set of top of the range performance cruising sails in good condition

Low hours Yanmar 54HP engines just serviced.

Yanmar saildrives just serviced (new seals, o’rings, new oil)

Folding Gori props New 2022

Engine rooms kept immaculate.

12V and 220V electrical systems thoroughly updated in 2020-2021 including 1580W Solar Power 

Top of the range Lithium Power Solution including Master Volt Lithium Ion, 310Amph Batteries x3 (total of 930Amph)

Westerbeke Generator 5.7Kw  

Wired to adapt to local voltage anywhere in the world with Master Volt IVET8 Isolation Transformer 120/230/240v in/out

Full set of recently upgraded cruising electronics including Garmin Navigation NMEA 2000 Network, GMI 20 Autopilot New 2022, 3 X GHC 20 Display screens New 2022, New GPS 2022

Panoptix Forward Looking Sonar New 2022

Garmin Chartplotter New 2022

Schenker Modular 100 Electron Analogic Watermaker 100l / h

7kg Washing machine New 2022

Bauer Junior II dive compressor with 4 complete sets of scuba diving equipment

Just antifouled September 2022

Presented turnkey and fully loaded with an impressive list of equipment, spare parts, tools, water toys etc.

Full Video tour available on our Youtube Channel at Nautilus Yacht Management. Filmed in Tahiti in September 2022. 

Available Now. 

Can be delivered. 


Few boats have come our way in a quarter of a century dedicated to sailing, cruising and the cruising community, which have had the jaw dropping effect of the extraordinary 'Mama Osa'. 

From her sleek but powerful lines, to the intelligence of her design, her hulls shaped to effortlessly conquer oceans and take you safely, and in utmost comfort to the furthest reaches of the world, the Knysna has, in spite of her deliberately kept small production numbers, also conquered the world of cruising with its enviable reputation. The name Knysna is known and awe-inspiring to those who have looked beyond the production lines for a boat that is not built to a price point, and where only the very best will do, from the drawing board to the final touches.

Sitting at the extreme opposite to production boats, the Knysna Yacht Company only produce 3 yachts a year, each on order and customised to their buyers specific tastes. This is also why Osa is unique, and yours in every way from the moment you will be able to proudly call her yours.

Meeting Osa is stepping into a different world, one without compromise. 

Please read on for the full description and watch our full video tour to discover this superb ship in details. We also have a series of additional videos to send you if you wish, and which show the more technical aspects of the vessel, as well as videos of the boat on the hard just last week (12th September 2022), as she was being re-splashed a week 'at the spa'.

For a bit of info about Nautilus Yacht Management, we are a boutique-style brokerage devoted to high quality cruising yachts and to the cruising community since our launch in Sydney in 2011. 

With several offshore branches from French Polynesia to Fiji, New Zealand and Australia to assist cruisers along South Pacific route, we are here to help both sellers and buyers with the logistics involved from registration to insurance, delivery, import, survey, storage and crewing if required. Ex- cruisers ourselves we just strive to help others begin their journey on the ocean. 

If like us, OSA has become an obsession for you, get in touch! Our team can organize a private video viewing, discuss the purchase process with you as well as have all the time in the world to answer your questions, put you in touch with the owners if you wish, assist with organising your visit, purchase, delivery home if needed, insurance, berthing, crewing, etc. 



A Word From The Owners - Why a Knysna catamaran?:

"To be honest, neither of us had ever even heard of the town Knysna, let alone the South African catamaran company named after it. We were in the market for a non-production, performance catamaran. So, we went to the 2019 Annapolis boat show hoping to be inspired by something different. Our friend, who was attending the show with us, was the first to mention the build quality and excellent design of Knysna catamarans. Having spent time in South Africa, he was enchanted with the sturdy build of South African boats and quickly convinced us to do a walkthrough of a Knysna. We both immediately began to fall for this boat builder. We loved the layout and feel of the boat. It was different then anything we had seen and it felt so solid. The crew showing the boat had sailed her from South Africa and they were as salty as they were knowledgeable. You could tell these guys had tons of sea miles under their belts. They knew the boat inside and out. Their respect and appreciation for her was infectious. We were sold, but we didn’t want to wait 1-2 years for a new boat. As a boutique builder, building only 3 vessels a year, we figured finding a used Knysna was likely out of the question, but we got lucky. Osa, then called Alley Cat, was on the market and ready to go in Sint Maarten, Caribbean. George and I immediately went to see her.  She was absolutely stunning, a real jaw dropper. The previous owner bought her new and spared no expense kitting her out.  Instantly we felt at home and could easily visualize our family living on this vessel. It felt special. One of a kind. And it still does.  Many of our boat friends covet Osa. Complete strangers have dinghied over to ask about her and for a tour of the inside. So needless to say, on December 5, 2019, during the sea trial when the surveyor asked us if we could see ourselves owning this boat. Without hesitation we said, “Absolutely!”. Six weeks later we moved our family from the snowy Canadian Rockies, to the Caribbean and aboard our new floating home.    At the time, we are not quite sure why we pushed ourselves to pack up our lives in Canada and move aboard post haste as we did. Today we attributed the immediacy we felt to move aboard to a number of things. Number one being, our daughter getting older. She was 12 at the time and we could tell that our window of opportunity to take her away on a sabbatical from school and friends was rapidly narrowing. Number two was the onslaught of the Canadian winter we were anxious to not endure. Number three would be covid. Of course we had no idea that covid was literally weeks away from shutting down the entire planet but when it did, and we were tucked safely aboard our floating home in the Caribbean, well, we were high-fiving each other for weeks afterward, endlessly grateful that we went through 6 weeks of frantic packing to get aboard and live our dream.     Every single day, over the past 2.5 years, at least one of us has declared aloud, "Man, I love this boat!". We have been extremly happy with our Knysna. It is so dependale, beautiful, strong, comfortable, and unique. We decided, as a cruising family, we did not need a super fast, performance catamaran. We wanted a safe and comfortable boat that sailed well and looked good. We are an active family. We love to surf and dive and we wanted space and the abiity for our boat to handle the extra weight of our toys. As a sailor with over 40 years experience sailing monohulls, George wanted a goodlooking boat he could have fun sailing. Something he could feel respond to sail adjustments and easily get up to 8-10knots. Osa ticked all those boxes. I wanted a safe, comfortable, & spacious boat with a water maker, functional & attractive cockpit, 3 cabin layout, dedicated shower stalls in the heads, decent storage and a nice galley up. Osa has fulfilled all our expectations and then some. We have been very pleased with the performance of our Knysna and have never once wished we went with a different catamaran.    After leaving the Caribbean, we headed to Panama and crossed the canal. We loved cruising the remote corners of the Las Perlas Islands, Coiba, and Bahia Honda. We surfed, dove and explored from the Darien Gap all the way up to northern Nicaragua. We took Osa up rivers and explored untouched corners of Central America. We sailed to main land Ecuador, leaving Osa on a mooring for a month while we trekked in the Andes. We had an amazing time sailing to and from the Galapagos, where we spent 2 months exploring. There are so many highlights of our adventures, but one that I will forever hold close to my heart will be the Pacific crossing from mainland Ecuador to Marquesas. After 28 days at sea, with Nuku Hiva insight, we all agreed that we could easily carry on sailing for another week or more. Osa carried us safely and extremely comfortably across the worlds largest ocean and no one was ready for our time at sea to come to an end. If that doesn't speak volumes about how much we love being on this boat, then I don't know what will! We have spent the past 6 months falling in love with French Polynesia. This place is enchanting, the epitome of cruising grounds. There is so much to see and do here, above and below the water, one could spend a life time exploring. The experiences we have had here connecting with local families has endeared us to this place forever.    We left Canada with the intention to sail for 2-3 years, and return for our daughter to complete her final 2 years of highschool. We intended to go as far as we could in the time we had. Covid definitely slowed us down but it did not steal the show. To be able to take our home with us to far flung places, to move under the power of the wind, to show our kids the world beyond their backyard, to push our comfort zones, to grow as a family into a team, to overcome adversity, to learn to trust the process and live in the moment, to live everyday as an adventure, to challenge our fears and tackle obstacles, to fulfill our dreams, to see our kids shine and become unique individuals with a strong sense of self, to meet people from all walks of life and be apart of their story for awhile, to make life long friends, to witness the wonder and majesty of nature every single day, to become better humans. That is what we set out to do. Mission accomplished. Now its your time."  Kristina and George - Tahiti, September 2022  


Engine #1

Location: Port

Engine Make: Yanmar 

Engine Model: 4JH5E

Primay Engine: Inboard

Drive Type: Sail Drive

Year: 2012 Hours: 2500

Power: 54hp

Propeller Type: Gori Folding 3 blade Props (new 2022)  

Engine #2

Location: Starboard

Engine Make: Yanmar 

Engine Model: 4JH5E

Primay Engine: Inboard

Drive Type: Sail Drive

Year: 2012

Hours: 2500

Power: 54hp

Propeller Type: Gori Folding 3 blade Props (new 2022)  

Fuel: diesel

Rated power: 39.6KW-53.8mhp/3000rpm  

Recent Updates: Both engines fully serviced, 2022

-Sail Drive SD 50, serviced 2022 (new shaft seals, O rings and oil, 2022)

-2x Racor FG 500 fuel filter 

-2x 3 blade folding Gori Props, new 2022 -2x New starter batteries, 2022    


Osa is equipped with a 12 volt DC electrical system.

The 12 Volt system has 3 separate battery banks, one for the ship's batteries and one for starting each engine.

Osa is also wired for 220V alternating current.

The AC system is supplied via a Mastervolt inverter/charger, Westerbeke Genset or from shore power.   

12 volt Ship System:

Solar panels- 395w Jinko Solar Panels x 4, new 2021. Total output: 1580w

Shore power cord

Charging System: 

-Custom Built Stainless Steel Solar Panel Support Rack, 2021

-Victron SmartSolar charge controller MPPT 150/85 x2, 2021

-Victron GX Color Controller, 2021

-Victron Centaur Battery Charger 80 amp, 2021

-Master Volt Mass Combi 12/400 Inverter Charger, with remote panel

-Master Volt Lithium Ion, 310Amph Batteries x3 (total of 930Amph)

-Master Volt Master Shunt

-BS Safety Latch Control x3

-Master Volt IVET8 Isolation Transformer 120/230/240v in/out

-Wired for altenators, port & starboard

-Westerbeke Generator 5.7Kw  

Owner's comment:  As a family of 4, we have been able to keep our batteries fully charged while making water, running the fridge/freezer and running all the electronics on board without having to turn on the generator for 5 months at a time. The generator is mainly used for filling dive tanks and using the washing machine.   

Additional info on electric equipment:

-LED deck lights for navigation, anchor light

-Underwater lights

-LED cabin lighting throughout

-Deckwash pump

-3 freshwater pumps

-Fusion stero network Bose and JBL speakers  


Sails: (All in excellent condition)

-Pro Furl Electric Furler for Genoa

-Pro Furl Manual Continuous Line Furler on the seagull striker (for oversized Genoa)

-Ulman Genoa in good condition, 50.27m2

-Ulman Genniker in good condition

-Precision Main Sail, July 2020, 75.16m2

-Symmetrical Spinnaker, with dosing sock, in good condition, 150m2  

Deck Hardware:

-Harken Manual Radial winch x 5

-Harken Electric Radial winch x 2 (new motor replaced in 2021)

-Mainsail traveller

-Stack pack with lazy jacks

-Batten cars

-Custom mainsail sailbag, 2020

-Sparcraft rig, new 2019


-45kg stainless steel Ultra anchor  

-60m galvanized chain, additional 40m rope  

-Quick Aleph 1500w Windlass  

-Spare anchor


-Cockpit seating, extendable table, table makes into a bed

-2x Large, sliding hatches on cabin top. Excellent for ventilation and for viewing the sails.

-Custom trampoline and window/hatch covers

-STIDD 1200 double helm chair

-Cork decking throughout

-Kayak/surfboard racks on port and starboard

-Stainless steel surfboard rack (aft)

-Dock lines

-Fenders x11

-Heavy Duty Shore Power Cord

-Whale deck shower, freestanding, hands free. Hot and Cold water

-Fish filleting table

-Walk through aft of main cockpit from port to starboard, excellent access to dinghy, liferaft, storage lockers, overhead surfboard storage, etc.

-Lecombe & Schmidt Hydraulic steering system, re-packed 2020

-Weber BBQ

-Cockpit fridge

-Cockpit cushions, new 2021

-Antifouling, 2022

-Space and plug in for ice maker

-Collapsable ladder

-Swim platform on starboard and port transoms

-2 large access hatches to the engine rooms

-8x aluminum mooring  cleats


Cleaned and polished fuel and water tanks 2022  

-Fuel: 614L

-Water: 614L

-Grey water: 2x  25L

-Black water: 2x  50L

-Propane: 3x 20lbs fibreglass propane bottles

-Extra long portable drinking water hose


-IridiumGo, plus external antenna  


-Viking 8 person life raft, serviced in 2021  

-Flares (2022), throw bags, man overboard pole, extensive first-aid kit  

-8x Coast guard approved life jackets   

-Manual and electric bilges  

-4 X Rule 2000gal/hr bilge pumps (two in each hull)  including spare pumps and float switches  

-Ditch bag  

-Safety access for fire extinguisher connection to engine room via aft cabins.   

-8x Fire extinguishers  

-Smoke alarms x2  

-Fire blanket (galley)


-Bauer Junior II dive compressor, with a bunch of spare parts  

-Full Dive equipment (BCDs, regulators, tanks) x4  

-Paddleboards x2   

-Possibility of surfboards (long and short boards) and kiting gear (3 kites, 2 boards, 2 harnesses)  




-Garmin Navigation NMEA 2000 Network

-GMI 20 Autopilot (2022)

-GHC 20 Display screens x3 (2022)

-GPS (2022)

-Panoptix Forward Looking Sonar (2022)

-Garmin Chartplotter, (2022)

-GWS 10 wind instrument

-VHF 2001/AIS radio

-2x Handheld VHF radios

-Airmar Log and Temp transducer

-Plastimo compass, (2022)


-3D Tender 12ft, with dinghy chaps, 2019

-Honda 20 horse outboard engine

This boat is equiped with dinghy davits. The dinghy is lifted via a gantry system. The mainsail boom has a slide out section to lift the tender from the water level and place it on the davit arm supports. Winching is done via the electrical winches. No detrimental body ergonomics, no heavy lifting. 


-Samsung 32" LED TV (saloon)   

-Samsung 22" LED TV (master cabin)   

-Fusion stereo network   

-Bose and JBL speakers


-Isotherm 200L Fridge/Freezer, 2020 (saloon)  

-Isotherm 90L Freezer (starboard midship)  

-AGE HOB Gas 4 Burner Stove  

-Euro Gas Oven   -Wine storage cubbies (saloon)  


-Pots and pans  

-Moulinex Blender  

-FoodSaver vaccum sealer  

-Tupperware food containers


-Tecma Toilets (electric, salt water) x3 all re-built 2021

-Cruisair 16000 btu Air Conditioner/Heater x2, serviced 2022 (one under seatee in salon, the other under the nav station)

-Hella Fans x7

-Teak and Holly floor throughout interior

-3 cabins (queen)

-1 Crew cabin/storage

-3 heads each with its own dedicated shower stall

-LED lights through out

-Saloon table makes into a bed

-Isotherm water heater, 2020 (starboard aft cabin)

-Bathtub in owners hull

-Desk in owners hull

-Vanity in owners hull

-Westerbeke Generator, full service 2022. New starter battery 2022 (port midship)

-Schenker Modular 100 Electon Analogic Watermaker, with all seals and spares (hoses, valves, electric high pressure pump, etc). Production performance 100L/hr with dual pre-filters setup and pre-wash charcoal filter system. (port mid ship)

-Ocean air mounted blackout and flyscreens on most hatches

-Security bars for hatches


-7kg washing machine, 2022 (aft cabin)

-Navigation station with desk, stereo, VHF, iridiumGO, Victron colour controller, westerbeke control panel, watermaker control panel, control panel for AC/DC connections, and 3 DC outlets. 

-Outlet stands that can slide down beneath the counter for clutter free space.



-1 year supply of 5 micron and 20 micron water filters

-Lofran Project X2 windlass (rebuilt)

-High pressure water pump (for water maker)

-Rebuild kit for watermaker, including all seals, high pressure switches and tubing

-Cleaning and pickling compounds for watermaker

-2x Zincs for props

-Anchor with chain and rope

-2x 4000 gallon RULE Bilge pumps

-2x 2000 gallon RULE Bilge pumps

-4x RULE float switches

-Black water macerator pump

-Racor Filters

-Many diesel engine spares, including: impellers, fuel injectors, seals, gaskets, etc. 


-Heavy Duty cables

-Electrical connectors

-Multiple cables and T-connectors for the Garmin

-Complete Garmin Autopilot setup, ready to install (including compass, control box, color controller, rudder sensor)

-Electrical butt connectors


-Filters and seals for Bauer air compressor



-enough wrenches, screw drivers, etc to do most maintenance on board

-delux 18v cordless Makita tool set: regular drill, hammer drill, side drill, angle grinder, jigsaw, vaccum, 2 battery charger, 4 batteries

-dremmel kit




Disclaimer: The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice.