Madiz is one of a few yachts to have survived from the early 20th century, and arguably there is no other yacht of this size, age, and original standing remaining. She was built in 1902 by Ailsa Shipbuilding in Troon, Scotland, and is the largest classic motor yacht currently listed for sale.

Madiz can also claim the title of the oldest vessel in operation to have Lloyd’s classification.

Originally commissioned by James Coates Jnr, from his friend and now legendary yacht designer G L. Watson, Madiz was intended as something of a mothership or support boat to Coates’ sizable schooner-rigged sailing yacht.

Madiz served in the Royal Navy in both world wars, hosted the British Royal Family, Frank Sinatra and the Rat Pack before passing into the ownership of Costas Keletsekis who in 2003 brought her back to Lloyds 100A1 class. In 2010, Madiz found her current owners and has since been meticulously maintained as a classic yachting icon.

The 120-year-old steel-hulled motor yacht, now powered by two Mercedes 250Hp engines, accommodates 14 guests in seven cabins and operates with a crew of 10. The vessel is complemented by a 6m Riva Superflorida tender and a 6m classic launch.

Madiz is located in Perama, Athens, where she is available for viewings by prior appointment.


Vessel Name: Madiz


Model Year: 1902

Year Built: 1902

Category: Motor Yacht

Country: Greece

MLS #: 405747

Staterooms: 7

Length: 55.4 (55.4m)

Draft: 13' 2" (3.99m)

Beam: 22' 7" (6.86m)

Cruise Speed: 10 Knots

Max Speed: 11 Knots

Water Capacity: 10566.88 Gal

Holding Tank: 2060.54 Gal

Manufacturer: MERCEDES

Model: Maybach

Engine Hours: 3300

Fuel Type: Diesel

Horsepower: 250

Manufacturer: MERCEDES

Model: Maybach

Engine Hours: 3300

Fuel Type: Diesel

Horsepower: 250

Steel Hull and Superstructure


  • Built by: Ailsa Shipbuilding, Troon
  • Year: 1902
  • Length: 55.40m (200′)
  • Beam: 6.86m (22′ 6″)
  • Draft: 3.99m (13′ 1″)
  • Classification: Lloyds 100A1 +LMC
  • Flag: Malta
  • Gross tonnage: 359 t
  • Net tonnage: 107 t
  • Naval Architect: G.L. Watson & Co.


  • Speed: 10/11 knots (approx)
  • Range: 2750 nm @ 10 Knots
  • Fuel capacity: 50,000 Litres (13,209 US Gallons)
  • Water capacity: 40,000 Litres (10,567 US Gallons)
  • Black water capacity: 3,900 Litres (1,030 US Gallons)
  • Grey water capacity: 3,900 Litres (1,030 US Gallons)
  • Fuel consumption: 170 L/h @ 10 knots
  • Engines: 2 MERCEDES 250 HP
  • Engine model: Maybach
  • Engine hours:
    • Port: 3300hrs (1-Nov-2008)
    • Starboard: 3300hrs (1-Nov-2008)
    • 3300hrs/engine since rebuild in 2008
    • Fully overhauled in 2006 during Lloyd's special survey.
  • Fuel: Diesel
  • Propulsion: Prop Shaft
  • Gearboxes: Reintjes, ratio 5.88:1, (approx 200-250 RPM at propeller)
  • Steering: Original mechanism (converted from steam to electrical)
  • Generators:
    • 1x 105 KVA Deutz (2004) : 0 hrs since W6 in 2024
    • 1x 100 KVA ONAN (2012) : 13700 hrs
  • Electricity:
    • 380 volts, 50 cycles
    • 220 volts, 50 cycles - via 2 transformers
  • Shore power: 380 volts
  • Batteries:
    • 4 x 220 amp/hrs main engines
    • 2 x 220 amp/hrs generators
    • 4 x 220 amp/hrs emergency lights and night operation
  • Air Conditioning: New


  • Sewage System: Triton 408 (4,080 litres/day)
  • Seafari watermaker
"Owner's" suite
Large stateroom with seating area, situated on the upper deck, featuring 2 sets of double window doors opening onto the deck.

"President" Suite
Full beam master stateroom with double bed and large seating area. Situated amidships for most comfortable motion.

"Lord's" suite
Large stateroom with seating area, one of the original staterooms, with part of the original mahogany panelling. Situated in the forward lower accommodations.

"Lady's" Suite
Large stateroom with seating area, the other one of the original staterooms, with part of the original mahogany panelling. Situated in the forward lower accommodations.

"Athenian" Suite
Large stateroom, partly original, with seating area, situated in the forward part of the ship, featuring a large central skylight.

"Ambassador" suite
Airy stateroom on the upper deck, featuring double window doors that open onto the deck.

1 x smaller stateroom, with 2 single beds and bathroom en suite facilities, useful for guests, children or accompanying personnel. This is also one of the original rooms.

All bathrooms have showers, basins and toilets and vanity unit. 

Crew Quarters
- Upper deck 
Captain's cabin with bathroom en suite, situated aft of the bridge.
- Lower deck 
1 x Double cabin with bathroom en suite 
1 x Single cabin with bathroom en suite
3 x Double bunk cabins
2 x Common bathrooms

Crew Galley
Crew mess with seating for 6
  • Inmarsat: NIL

Radar/Plotter: Furuno Navnet
Echo sounder: Furuno LS 6100
Satellite Compass/GPS: Furuno SC-502
Magnetic Compass
AIS: EM Track A200

Riva Superflorida, 6m, (1957), with Chrisler petrol engine
6m Classic launch, (2019), with Nanni diesel engine
Davits: 2xElectric driven classic davits, one for each tender.
  • Windlass: Oiginal windlass (converted from steam to electric drive)
  • Anchors: 2x400 kg with 5 shackles on each chain
Liferafts: 2 x 12 people
Fire fighting: 6 x Fire line points with hoses. 
Full complement of fire extinguishers as per fire plan. 
2x fireman's outfits with breathing apparatus & spare air bottles
EEBD devices: 4 pieces
Fire detection system for main deck, engine & crew area
Reclassified by Lloyd's in 2003 & 2007
Special survey completed in 2007

Madiz underwent a major refit under the Owner's careful and strict supervision in Perama, Greece that included a 17 month dry dock period.

The main works done are as follows:
Steel works
- Replacement of approximately 50 tons of plating (internally and externally) with 8 mm and 10 mm steel, including bulkheads, tanks and the majority of frames below the waterline in forward and aft areas. Some areas were completely rebuilt.
- Diesel tanks extended and rebuilt 
- New water tanks
- New black and grey water tanks
- All tanks were pressure tested under Lloyd's supervision

A full new set of plans was drawn up and approved by Lloyd's

- Almost all piping replaced
- New sewage treatment plant installed
- All pumps either renewed or overhauled
- The majority of electrical wiring replaced
- New main electrical switchboard and 220 transformer
- New main engine control panels
- New generator added
- Emergency lighting and alarms renewed
- Lignum vitae bearings renewed
- Main engines - major overhaul
- Shaft bearings re-metalled 
- Intermediate shafts, tail shafts and propellers tested 
- Main engines and shafting system re-aligned
- Air conditioning system was rebuilt
- Rudder mechanism rebuilt

- New (President) stateroom built
- Forward (Athenian) stateroom extended
- Existing wood panelling removed, underlying plating cleaned and painted, woodwork repaired or refurbished.
- Most electrical wiring replaced
- New galley installed in 2010

- Replacement of teak decks on foredeck, aft deck & all of the upper deck
- Refurbishment of all existing panelling and deck fittings
- Anchor windlass entirely rebuilt
- Complete re-paint of all exterior surfaces in 2023
181' 10"(55.4m) 1902
Motor Yacht
€9,750,000 EUR