S/V Kahu is a Grenada based 1984 Sigma 41 For Sale By Broker. Responses to inquiries may come from a broker who is representing the owner as a fiduciary. This owner requires financial settlement only. No trades.
The Sigma 41 is widely regarded as one of the most capable racer-cruisers of her generation — a design that combines lessons learned in the toughest offshore races with refined performance for ocean passagemaking. Kahu is an exceptional example, refitted from stem to stern by experienced owners and proven on the family’s Atlantic crossing from Europe to Brazil, then the subsequent cruise north to the Caribbean. Her build quality, balance under sail, and seaworthiness are hallmarks of David Thomas’s designs, while her deep fin keel and fractional rig deliver the performance and handling that make the Sigma 41 a success in offshore racing and passagemaking alike.
Below decks, Kahu is smartly laid out for bluewater voyaging, with two private cabins, two heads, real sea berths, and an efficient galley and nav area. Her systems were comprehensively upgraded between 2023 and 2025 for reliability, comfort, and self-sufficiency.
The New Zealand–flagged owners have enjoyed Kahu as a safe, powerful, and comfortable cruiser capable of excellent daily mileage. Their Atlantic and South American voyage confirmed her as a yacht that handles ocean conditions with ease and remains well-mannered and quiet at anchor. She is now offered for sale as they cruise the Caribbean.
Kahu represents an unbeatable combination of strength, recent investment, and proven bluewater ability that you can rely on to take you further, have more fun, and get there faster, too!
Features
- Beta Diesel 350hrs
- New rigging and electronics
- Windvane & bow thruster
- Solar & wind generator & lithium
- All Ocean Ready
Specifications
| Name | S/V Kahu |
| Make | Sigma |
| Model | 41 |
| Year | 1984 |
| Type | Monohull Sailboat |
| Builder | Sigma |
| Designer | David Thomas |
| Construction | Fiberglass |
| Cabins | 2 |
| Heads | 2 |
| Galley | Aft to port beside companionway |
Dimensions
| Loa | 41ft / 12.50m |
| Lwl | 33ft 3in / 10.13m |
| Beam | 12ft 2in / 3.71m |
| Headroom | 190 cm |
| Draft | 7ft 7in / 2.31m |
| Mast Height | 59ft 0in |
Tankage
| Fuel Tanks | 132.49 liters |
| Water Tanks | 321.76 liters |
Performance
| Engines | 45HP Beta Marine 45T 2021 |
| Engine Hours | 360 |
| Generator | Superwind wind generator |
| Displacement | 19000 lbs |
| Speed | 7.74 kn |
| Sails | Mainsail (3 reefs), genoa, 2 spinnakers (one cruising chute), storm jib, trisail |
Layout Diagram

Inventory
Vessel Overview
- Sigma 41 racer-cruiser, designed by David Thomas, built 1984, launched 1986 by Marine Projects Plymouth
- Hull: solid fiberglass; deck: balsa sandwich with plywood reinforcement
- Keel: cast iron with lead shoe, deep fin keel for offshore performance
- Rig: 3/4 fractional Selden mast, deep forefoot, two-spreader configuration
- Refit periods: 2012 (Flexiteek deck, canvas, electric primaries), 2023–2025 comprehensive refit (rigging, electricals, through-hulls, batteries, monitoring)
- Proven offshore passage: Atlantic crossing Cape Verde to Brazil, coastal South America, cruising Caribbean
- Flag/registration: New Zealand flagged, VAT paid in EU
- Current location: Caribbean (listed in Grenada)
Accommodation
- Cabins: 2 (forward cabin with V-berth convertible to storage; aft cabin port with large double berth)
- Heads: 2 (forward head with Jabsco manual toilet, basin, shower sump; aft head with basin and shower sump)
- Main saloon: U-shaped settee to port with folding dining table; straight settee to starboard; pilot berths outboard on both sides
- Galley: U-shaped, secure, located aft to port beside companionway
- Nav station: half-size to starboard with quarter berth behind (currently technical/storage area)
- All berths fitted with lee cloths
- New mattresses and settee squabs (2023)
- Massive starboard cockpit locker with standing-room storage
Bunk Lengths
- Forward cabin: 190 cm length x 210 cm width at head / 80 cm width at foot
- Aft cabin: 190 cm length x 130 cm/70 cm
- Starboard settee: 190 cm
- Port settee: 180 cm
- Pilot berths: 190 cm
Headroom
- Forward cabin: 175 cm
- Forward head: 185 cm
- Main cabin: 190 cm minimum throughout
- Galley: 190 cm
- Aft head: 175 cm
- Aft cabin: 180 cm
Interior Comforts and Amenities
- Two manual Jabsco heads, fully serviced 2024
- Saltwater/deck wash outlets in cockpit and galley (2024)
- Freshwater cockpit shower (2024)
- Techimpex 2-burner hob (needs repair/replacement)
- Magma BBQ
- Three Hella 12V fans (2023)
- Top-loading fridge with Frigoboat K35 water-cooled compressor (controller replaced 2024)
- Sealarm gas solenoid control (needs replacing)
- New freshwater tap (2023)
- Pressurized freshwater system with 1 L accumulator plus foot pump backup
- 40 L QL water heater (engine/AC heated)
- Three Campingaz 2.7 kg propane tanks
- CO and smoke alarms
- Warm solid wood joinery, excellent ventilation from six hatches (two new in 2024)
Electronics and Navigation
- Airmar DST810 speed/depth transducer (2023)
- B&G WS310 wind sensor (2023)
- NMEA2000 barometer (2023)
- Digital Yacht AIS with splitter
- ShipModul Miniplex 3Wi N2K multiplexer
- NASA cockpit displays: wind, close-hauled wind, log, depth
- B&G HALO 20+ radar (2023)
- Digital Yacht router
- NASA depth transducer (backed up to NMEA2000 cockpit unit)
- Precision 9 compass (2023)
- Plastimo Offshore 135 compass (2024)
- DualNav GPS antenna
- Iridium GO with spare SIM cards
- ICOM IC-M302 fixed VHF
- Standard Horizon HX870 GPS handheld VHF
- Ocean Signal EPIRB1
- Raymarine linear drive autopilot with ST6002 controller
- Loudhailer/horn (functioning but disconnected)
- Sidepower wireless remote for anchor windlass and bow thruster
Electrical Systems
- Four 100 W Renogy rigid solar panels on stainless liferails (2023)
- Superwind wind generator
- Victron MultiPlus Compact 1600/70 charger/inverter (2023)
- Renogy 50 A DC-DC dual-input charger with MPPT and remote display (2023)
- Two 100 Ah Renogy lithium service batteries (2023)
- One start battery (2024)
- Two bow thruster/windlass batteries (2023)
- 70 A alternator (new 2024)
- Remote battery monitors for house and engine banks
- Renewed fusing and cabling throughout
Deck and Hull Equipment
- Four forward keel bolts replaced (2022)
- All underwater through-hulls replaced with Trudesign (2024)
- Foredeck re-cored (2023)
- Antifoul: Micron 350 (2024)
- Flexiteek decking (2012)
- Windows re-bedded (2025)
- Six ventilation hatches (aft head and aft cabin new 2024)
- Quick horizontal anchor windlass with extended fairlead
- Anchors: 20 kg Rocna (2017); 15 kg Delta; 15 kg Bruce
- Ground tackle chain: 80 m 8 mm chain (2023)
- Aries wind vane steering
- Simpson dinghy davits (interchangeable with windvane)
- Pasarelle and outboard davit
- Swim ladder
- Twin biminis (can remain up while sailing) with insert panel for shade at anchor
- Spray dodger with reversible side curtain, mosquito nets, multiple covers
- Hero 4-person ISO 9650-1 life raft (next service 09/26)
- Katadyn Powersurvivor 80E watermaker (serviced 2025; new membrane 2019)
- Jerry cans: five diesel, one gasoline
- Whitlock Cobra steering system
Sails and Rigging
- Standing rigging replaced (2023)
- Selden 2-spreader 3/4 fractional mast serviced 2023 (spreader end caps and halyard sheaves replaced; fittings reinstalled with anti-corrosion coatings)
- Inner chainplates removed and inspected 2023
- Solid vang and adjustable backstay
- Selden Type C headsail furler
- Three 10 mm Dyneema halyards (2023)
- Dyneema running backstays and lifelines (2023)
- Webbing jacklines (2023)
- Mainsail (2012, serviced 2024) with 3 reefs and flattening reef
- Genoa (2012, serviced 2024)
- Two spinnakers (one recut as cruising chute, unused by current owner)
- Storm jib and trisail (original, unused)
- Ronstan Ballslide sail track system (2012)
- Spinnaker pole and Spinlock jammers
- Two Lewmar Evo 50 electric primaries (2012)
- Six Lewmar 40 self-tailing winches plus four Lewmar 40 control line winches
- Stackpack (functional but needs repair)
- Bimini/spray dodger (2016)
- Various lines, fenders, spare blocks, winch handles, and hurricane lines
Mechanical Equipment
- Beta Marine 45T turbo diesel engine (built 2021, installed 2024)
- Engine hours: 100 hrs since installation, 350 hrs total
- Deluxe cockpit control panel: oil pressure, temperature, voltage, tachometer
- New 60 mm Vetus exhaust system
- New Morse control cables (2024)
- New shaft (2023)
- Max-Prop 2-blade Classic with spur rope cutter
- R&D flexible coupling (2024)
- Shaft coupling and mounts (2024)
- Engine compartment fan (2024)
- Sidepower SP75 bow thruster with remote
- Fuel lines and filters replaced 2024 (Delphi primary + separator)
- 1100 GPH electric bilge pump (2024)
- Two manual bilge pumps (cockpit and cabin)
- Automatic engine compartment fire extinguisher (2023)
- Two Firex lithium extinguishers (2023)
- NASA Marine exhaust temperature alarm
Engine Info
- Engine sourced from TP52 raceboat owner (250 hrs when purchased)
- Complete renewal of engine systems at installation: exhaust rerouted and upsized to 60 mm, sound and heat insulation replaced
- Through-hulls, strainers, hosing, fuel lines, and primary filter replaced
- Electrical cabling renewed; deluxe engine panel installed at cockpit helm
- New flexible coupling and new shaft installed in 2023
- Prop: Max-Prop 2-blade Classic; fixed-pitch spare prop available
- Extensive engine spares: turbo, starter motor, four injectors with o-rings, belts, filters, anodes
Tankage
- Fuel: 159 L (35 US gal) stainless steel tank with separator before primary filter
- Water: two aluminum tanks, total 386 L (85 US gal)
- Watermaker: Katadyn Powersurvivor 80E (serviced 2025)
Safety and Emergency Equipment
- Ocean Signal EPIRB1
- Hero 4-person ISO 9650-1 life raft (service due 09/26)
- Automatic engine compartment fire extinguisher (2023)
- Two Firex lithium extinguishers (2023)
- CO and smoke alarms
- Bilge pumps: 1100 GPH electric (2024) plus two manual bilge pumps
- Loudhailer/horn (functioning but disconnected)
- Navigation and communications redundancy: AIS, VHF fixed and handheld, Iridium GO
Spares and Consumables
- Extensive spares and consumables for long-term cruising
- Engine spares: turbo, starter, four injectors, belts, filters, anodes, fixed-pitch spare prop
- Deck and rigging spares, spare blocks, winch handles, lines, fenders
- Watermaker spare membrane (new 2019)
Owners Comments and Boat History
- Owners purchased as a safe, high-performance, comfortable family cruiser suitable for bluewater voyaging
- Refit in Spain and light use 2012–2022 including custom Flexiteek decking, new canvas, electric primaries
- Major refit 2023 in preparation for offshore sailing: new standing rigging, engine, electronics and more
- Proven offshore performance: comfortable motion, good upwind performance, reliable at anchor in high winds
- Crossed Atlantic to Brazil and cruised to the Caribbean with family; currently offered for sale due to change in owners' circumstances
Disclaimer
- Vessel details offered in good faith; accuracy and condition not guaranteed — buyers should instruct agents/surveyors to validate items and condition






































