Lagoon 500


Owner's Version w. extra large separate Master stateroom but 4 cabins total.

Owned by 3 consecutive cruising families who continuously upgraded the boat for comfortable and safe cruising.

Caretaker on board at all time

Interior upholstery fully replaced in 2022

Enclosed cockpit and flybridge for weather protection

Factory upgrade from 54HP regular engines to 75HP each

Well maintained Yanmar 4JH3-TE engines. Just serviced.

Sail drive seals fully replaced 2022

3 blades folding propellers

New rigging 2020

New sails 2021

Onan 11Kva generator

OPEN OCEAN Watermaker – 180L/h

Electric primary winch and davit winch

4 cabins and 4 heads with completely separate owner’s cabin as you would expect on an owner's version, with it's own private stairs for complete privacy.

Huge amount of storage throughout. This boat is ideal for a long term cruising family.

Washing machine, separate dryer, additional fridge and freezer downstairs, ducted vacuum

Air conditioning throughout

Wet bar in cockpit

50 Inch Falcon Smart TV June 2023

Fusion Sound System with Zone Control Throughout the boat

Wired for 240 V, and most plugs have been upgraded to Australian/NewZealand type

1500 Solar power on arch and wind generator

3x Mastervolt Marine Battery Chargers

Huge 19KWH House Battery Bank

Huge inventory including spares, tools, water toys, dive compressor, 2 dive tanks

September 2022 full survey report available on request

Comes fully loaded with everything you need to just step aboard and begin your journey. 

Read on for the full description!

Delivery can be arranged anywhere in the world



"Looking for the adventure of a lifetime and the boat to have it on! Look no futher. This Lagoon 500 has taken our family across thousands of miles of blue water ocean and back again, and now it is time to pass it on to someone else. 

Firefly has been well loved, and cared for throughout her many miles, with many decades of good life ahead of her. 

We priced Firefly as low as we could, in order to give another family the incredible opportunity afforded by this capable Bluewater cruising boat. She comes fully equipped with not only all the safety equipment, tools and spares you could need, but a whole host of toys, like standup paddle boards, tubes, battles mats, and more to make your time at sea unforgettable. 

If your looking for a well loved boat, that is turnkey ready to go, this is the one! She is in excellent mechanical condition, and had brand new upholstery inside. There are wind and fly screens for the entire back cockpit, as well as a fully enclosed helm station above. 

Firefly has two well maintained Yanmar 75 HP engines that are happy pushing her along at 8 knots, and sails that are only a couple years old, for worry free silent propulsion. The rigging was all replaced or serviced during a major overhauls in 2020, and has many years of service ahead of it. The seals in the SD-50 Sail drives were replaced a year ago, and should also provide worry free operation. 

The three downsides to Firefly, are worn flooring, it is in great mechanical shape but shows its age, crazing on the sugar scoops gel coat, and the dinghy has seen better days, though again, mechanically it is in excellent condition. 

Speaking of the dingy it is a Yamaha 40HP, that can plane fully loaded with 6 people, tow a knee board, or just get you to and from shore. It isn’t as pretty as it once was, but run excellent, and has been an absolute workhorse. 

Bottom paint is less than a year old, and was applied professionally in Bay of Islands New Zealand.

The original owner had the boat in Tahiti until 2018 when it was Purchased by a certified captain, who brought it through an extensive refit after sailing it to New Zealand in 2018-19 with his family. He used it to travel through much of the pacific, and then down the southern island of New Zealand. 

We purchased it in Oct 2022 and sailed her up to Vanuatu, Across to Australia, up and down the east coast, and then to New Caledonia, and then Vanuatu again, where she is currently. She has been in bluewater use extensively for the past 6 years. Before that she was owned by a french man in Tahiti who used her personally.

There are spares plenty, and she is setup for immediate sailing on the next adventure.

Firefly is registered in San Marino, Bluewater Registration. De registration in less than 5 days so it is easy for a new owner. No liens, or insurance claims etc. We had gel coat repairs done on the port hull after scraping a pylon, but as it was minor damage, we never had it go through insurance. Nothing structural. Work was completed by Rivergate Marina in Brisbane. 

We planned on sailing for a couple years as a family, but my wife gets really bad motion sickness. And despite me and the boys being fine, it is only a family adventure if the whole family can enjoy it. So were selling. Im a bit sad, but okay with it. New adventures will come."

The Lagoon 500 Firefly is a serious  offshore cruising vessel, designed and built for unlimited offshore adventures and independent, luxurious life on board for months at a time. The space is simply huge, as is the storage capacity for a large family, or group of friends who can easily make this boat a veritable home. This Owner's version is also Ideally suited to a skippered charter venture as well, should you wish to tap into the inexhaustible demand for this market anywhere in the world.

The layout is uncommon for a 50' catamaran, and very much based on Superyachts, with its entirely separate owners' stateroom, which mimics what you would expect size-wise on the Lagoon 440 owner's hull, with separate staircase access, giant island berth, lounge area with a big couch, walking wardrobe and extra large ensuite with seperate shower.

Forward to starboard is another dedicated staircase to what can be the crew stateroom, or very private guest stateroom, with a large double cabin and ensuite head / shower area with a screen door to separate it from the main bathroom area.

Port side is another companionway with long hallway, which on Firefly ideally house the laundry (washing machine and separate dryer), big cupboards, and a door at each end for the two guest staterooms, both with abundant storage, queen size bed, large windows and opening portholes / deck hatches, and in the aft cabin a drop-down deck / study area. 

Firefly has a completely separate helm station from the aft cockpit, which leaves your family or guests undisturbed when sailing. The large U shape settee can easily sit 10 or 12 people. There is plenty of dedicated storage all around, and a very convenient wet bar with large sink, perfect for preparing drinks, or to clean up the fish you just caught.

On the aft deck, which runs the whole length of the aft cockpit, there is a brand new stainless steel BBQ mounted on the rail, perfectly positioned to keep drips from falling on the gelcoat.

Going up a few easily accessed steps is the very large flybridge / helm station, with good visibility all around and a great view of the sails. The helm seat can sit an entire family. The helm bring every ropes control back to within easy reach of the helmsman, with a foot operated electric winch to handle all your sheets. The large plotter and all the instruments, as well as the radio and engine controls are all located there.

Forward is the giant deck and trampoline, with huge deck storage on either side of the anchor well. The windlass was recently replaced with a powerful Maxwell 1500 watts.

Going inside the large saloon is level with the U shape galley, functional and equipped for commercial catering if desired, with a full size 4 burners stove, oven / broiler, 3 sinks (one for drying), and a fridge / freezer. There is abundant storage all around the salon and galley, with additional under-floor storage as well, perfect for cans or bottles.

Going down the port side companionway is a recently installed 9kg Robinhood washing machine and separate dryer. Both running off the shorepwoer (220/240V), or the generator (11Kva Onan), which works perfectly and was just serviced again.

A large stainless steel and separate freezer are also installed in this hallway, ideally located close to the galley.

Next to the salon is a large navigation area, complete with large size repeaters, autopilot repeater for control and navigation from inside the boat, as well as the radio, sat phone, ect. This Lagoon 500 is equipped with Starlink, which the owner can transfer to a new owner and include in the sale if desired.

Firefly (just re-named from Chaos), was the home on the ocean of 3 consecutive families, who brought her first from France to Tahiti, then to NZ, and eventually back again around the Western South Pacific to Australia and Vanuatu, where she is now located and is very well taken care off by the owner's nephew, (who helped us put together the video walk-through).

Firefly has kept everyone safe and comfortable across thousands of ocean miles, and is ready to go again. She was surveyed in September 2022 by Stanley Lehman in NZ. The report is available.With a little cosmetic work to her gelcoat (sugarscoop areas mainly), some of the interior timber trimmings and the flooring the salon are showing some wear and tear. The owner has otherwise kept the boat mechanically and in all other aspects in excellent condition, and with a very recent rigging, sails, and all her mechanical heartbeat maintained religiously, she is ready to be delivered to you, or to just step board and continue your journey. 

Lastly, Firefly comes turnkey and with an enviable inventory, including an astonishing supply of tools and spares, reliable dinghy, safety equipment and water toys.

Read on for the full description and for more information please contact our friendly team at Nautilus Yacht Management. We are cruising yacht specialists and carefully check all our listings for seaworthiness, consistent maintenance by their owners, seagoing  capabilities and specific qualities to be suitable as live-aboard.

Our agency has helped buyers from all around the world purchase the boat of their dream, and over a decade of working on an international platform has provided us with the knowledge to help you with all the steps of your purchase, import, delivery, registration etc. Purchasing a yacht overseas does not have to be stressful. We are here to help.


  • 2 X 240L Fresh Water Tanks made from Plastic in each hull for a total 960L fresh water capacity. The fresh water tanks are unified through a fitting, and are separated to better distribute the weight of the fresh water.
  • 2 X 240 L Diesel tanks under the Back Cabin beds, for a total of 960L Diesel Fuel Capacity. Made from HDP Plastic, they have transfer pumps, shut offs and two separate filling inlets on each hull. The fuel can also be transferred from Starboard to Port, should it be needed. 
  • 2 X 50L Blackwater tanks in the two back cabins for a total of 100L. The front cabins just go directly to the ocean.


  • Yanmar 75 HP Engines both Under 5500 Hours. Oil and Filters changed every 250 hours, and Impellers, Belts, changed every 500. Last service showed the Port Impeller with a small amount of wear, and a small piece of the impeller missing, but not enough to concern. Starboard impeller was fine, but replaced anyhow. 
  • SD 50 Saildrives. Seals were changed during haul out in Oct 2022. (Owner's note: The Starboard Saildrive Oil Fill cap needs to be replaced, as it is cross threaded, so care needs to be taken when putting it back after checking oil levels, to make sure it is sealed properly.
  • Boat will cruise comfortably at 8 knots with both engines running at 3000 RPM, 6 knots with just one engine at 3000 RPM. Max speed 10 knots.
  • Starter Battery Replaced June 2023
  • Engines serviced every 250 hours as per manufacturer recommendations


  • CUMMINS ONAN MDKBL 11KW Generator (Serviced March 2023).                Hours over 5500, Runs reliably, serviced regularly. Extremely reliable. Has its own Starter Battery. (Owner's note: Alternator just went out, new one on order from Australia, will likely be installed within a month). 


  • OPEN OCEAN Watermaker - 180 L an hour. Works incredibly well. New Membrane Dec 2023 (Owner's note: Second membrane just failed, new one on order, again, just waiting for someone to pick it up in Australia for me). 


  • Bimni over Helm Station, Fully enclosed, New in 2020
  • Weather / sun protection cockpit covers / side curtains
  • Maxwell Windlass New 2021 
  • Electric Winches for Main Halyard, Headsail, Dingy.


  • Dingy 3.9 Center Console, aluminium RIB Highfield in poor Cosmetic Condition, but excellent running condition
  • Yamaha 40 HP outboard. Regularly Serviced. Engine hours unknown, but extremely Reliable. Engine cover has been repaired after the dingy was sucked under the boat. 


  • Owners Version Lagoon 500 with huge Master stateroom + 3 ore double cabins, 4 heads layout. 
  • The Master cabin / Owner's cabin is on the starboard side, with its own companionway (staircase), ensuite, large couch, extra room, ect.
  • The Master cabin has two hanging lockers, long enough for dresses, as well as 8 cabinets with drawers. The bathroom on the owners cabin is also a bit bigger with additional storage spaces above the toilet. 
  • 12v Adapters by all beds for USB charging, as well as LED Cabin Lights (2022) and reading lights above every bed. 
  • Crew or guest cabin with its own companionway forward starboard side with its own ensuite. 
  • Port side has a single companionway and hallway servicing two fully enclosed staterooms each with their own ensuite. Aft head area / ensuite has a separate shower and deck / study.
  • Large amounts of storage under all the beds, with 4 drawers under each bed, as well as a large cubbies for items such as blankets, backup parts etc.
  • Air conditioning throughout.


  • Each Bathroom features an overhead hatch, as well as side ports for cross ventilation. 
  • There are four heads, all electric, and very reliable.
  • The port Forward cabin has had the main drain lines replaced recently, and the other main drain lines are all in great working order with no issues flushing. 
  • Each aft heads has a holding tank (50L each)
  • Forward heads are direct flush
  • Both aft heads feature separate shower area with door
  • Forward heads feature separate head with drop down lid / seat and shower with door, closing off the rest of the bathroom.
  • Each bathroom has a mirror cupboards and plenty of storage 


  • Hot Water Comes off the Port Engine, or when you run the generator, and is well insulated and so it lasts days after running the engine. 
  • The galley is well appointed u shaped. Features one fridge/freezer upstairs and two additional Stainless Marine Fridges in the Port Hull. 
  • There is a home sized oven and four burner gas stove, with Saftely Solenoid gas shutoff, as well as self starting ignition. 
  • Breadmaker, Blender, Rice cooker all included. 
  • There is a sink outside for cleaning fish and vegetables before bringing them into the boat, as well as for serving food to guests in the cockpit. 


  • Washer and Dryer onboard, New 2022, 9L Washing Machine and separate dryer, for those things that just need to be dried. 
  • 50 Inch Falcon Smart TV June 2023
  • Fusion Sound System with Zone Control Throughout the boat, so you can listen to you music wherever you want to be. Additional Remote up in the helm station so the captain has ultimate control. As well it can be controlled via a bluetooth App on your smart devices. 


  • 6 X 2V LIFEPO Marine Batteries for a total of 19KWH @ 12v.
  • 1500W of Solar on a large solar arch.
  • ATMB Mariner Wind Generator
  • 30 or 50 amp shore power plugs.
  • Upgraded 60 Amp Alternator on Port Engine.
  • Boat is wired for 240 V, and most plugs have been upgraded to Australian/NewZealand plugs. 
  • Cummins Onan MDKBL 11KW Generator (Serviced March 2023)
  • Portable Solar Panel for Emergency use
  • 3x Mastervolt Marine Battery Chargers

  • Huge 19KWH House Battery Bank

  • Separate engine and generator batteries. One new start battery June 2023


  • GME 406 Mhz Satellite EBIRB
  • Garmin 1222xsv Touch Chartplotter - 2020
  • Garmin VHF 115i Marine Radio
  • Raymarine ST-60 Wind Inducer
  • Raymarine ST60+ Display
  • Garmin Inreach Messenger
  • Handheld Garmin
  • Can transfer the Installed Starlink to New Owners if they wish


  • Diesel shutoffs located under each back cabin bed.
  • Large Fire extingushers in all stairways and near kitchen. 
  • 2 X Liferafts, 1 X 8 Person Certified in New Zealand, Other one unknown certification.
  • 4 X 1800L Bilge Pumps, 2 in each Hull, plus 2 Crash Pumps in each hull, controlled via switches in the helm station.
  • Manual Bilge Pumps for each hull located in the cockpit. 
  • 10 X OffShore Certified Lifejackets (all in date) with built-in harness.
  •  $3500+, Medical Kit, Including Antibiotics, Suture Kit, Blood Oximiter, Inhalers, Nebuliser, medicine all purchased Oct 2022, in date and non expired. Organised.

  • Emergency Ditch Kit, Includes a Garmin Inreach, GPS Unit, Solar Panel, and necessary Cords.


  • Headsail and Mainsail were replaced 2020.
  • Rigging replaced 2020. 
  • Main halyard was replaced in early 2023 with a Dynema Line.
  • Main Topping Lift was replaced June 2023


  • Bauer Junior ii Dive Compressor (just serviced March 2023)
  • 2 Dive Tanks
  • Battle Mat Floating Platform (2022)
  • Standup Paddle Board (2022)
  • Knee Boards, Tow Ropes
  • 3 Person Towing Tube (2022)
  • 2 Person Ocean Kayak


  • Bottom Paint Oct 2022
  • New Interior Upholstery 2023
  • New generator alternator 2023
  • New halyards for main and Genoa 2023
  • New sails 2020
  • New washer and dryer 2022
  • New Bimini 2020
  • 50 Inch Falcon Smart TV June 2023

  • New Maxwell Windlass 2021
  • New sail drive seals October 2022
  • All new cabin lights LED 2022


The owner writes: "I'm a tool guy, so the boat comes loaded with spares for practically everything including the autopilot, and the instrumentation, but also thousands of dollars of stainless hardware, filters, pumps, belts, impellers, screws, pulleys, sail repair kits, dinghy repair kits, electrical supplies, plumping Supplies..."

$3000 + Power Tools purchased within the last year. 

  • Makita Power Drill, 
  • Ozito Portable Pump, 
  • Ozito Skill Saw
  • Ozito Multitool
  • Ozito Sawzall
  • Ozito Power Drill
  • Ozito Happer Drill
  • Ozito Shop Vac
  • Battery Chargers etc… 
  • Polisher


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.