McConaghy MC75

Commissioned by an experienced offshore racer, JACK was built without compromise from the outset — conceived to deliver true bluewater performance without sacrificing the comfort demanded by serious family cruising. 

Her construction credentials are exceptional: full carbon throughout, launched by the same yard responsible for the AC40 America's Cup racing platform. The result is a hull that is as fast as it is refined.

JACK's offshore capability is race-proven. In 2024 she claimed first place in the ARC Transatlantic multihull class, completing the 3,135nm passage from Gran Canaria to Saint Lucia with authority.

The design places equal importance on environment and function. Extensive glazing, fully retractable side windows and a level, open-plan layout create a strong visual connection with the sea and allow natural light to define the minimalistic interior. The result is a calm, stylish living space that feels considered and modern.

On deck, the flybridge and deck spaces are arranged for relaxed use both underway and at anchor, with multiple seating and lounging areas. The yacht is well equipped for an active cruising program, carrying a broad selection of tenders, water activity equipment, supporting extended time aboard for family and guests.

Her specification highlights include:-

• Interior styling by m2 Atelier with five double ensuite cabins, each with      outboard facing double berth, plus further ensuite twin crew bunk cabin. Crew accommodation for up to 4 when utilising forward port    double ensuite cabin for crew

• Carbon composite construction with E-glass/epoxy/foam sandwich and structural carbon reinforcements

• Topsides finish in Oyster White

• Hydraulic-actuated centreboards with three positions: retracted 1.68m, mid 2.46m, fully deployed 4.5m

• Twin helm pedestals on flybridge with carbon fibre helm wheels

• Hall Spars carbon fibre mast and boom with composite and rod standing rigging

• Cyclops Marine load cell pins on shrouds 

• Reckmann hydraulic genoa, staysail and Code 0 furlers

• Harken 3-speed hydraulic winch package

• Doyle Sails Stratis sail package with square-top mainsail

• Twin Yanmar 4LV150 150hp engines with shaft drive and Brunton 4-bladed propellers

• 2x Integral 9Kw Generators mounted on main engines for fast charging

• Lewmar 300VRTTH retractable hydraulic bowthruster

• 48vDC and primary domestic systems

• CZone DC Digital Switching System

• Mastervolt MLI Ultra Lithium Ion service battery bank

• Mastervolt battery chargers and Victron inverters

• Integral E-Power engine-mounted DC generators each producing 9kw @ 48vDC

• Cummins Onan 27kw 220vAC 50Hz diesel generator

• Soliban treadable solar panels with approx. 3.2kw total combined output

• Gianneschi dual voltage pressurised fresh water system

• Spectra Newport 700 220vAC reverse-osmosis watermaker

• Sanisplit macerator and waste water control system

• Approx 3,000 litres fuel capacity and 3,200 litres fresh water capacity

• B&G instrument package with Zeus3S glass helm plotter displays, Halo20+ radar, Sonar hub module with Forward scan transducer, H5000 autopilot system and AIS transponder

• Iridium C700 Certus terminal

• Starlink satellite communications antenna

• FLIR M232 IP thermal imaging camera

• Electric split (crew and guest area) galleys with induction cook top, oven and microwave,dishwasher, multiple fridges and freezers, ice maker and wine fridge

• Laundry with Siemens washer/dryer

• Tecma 24vDC fresh water flush electric heads

• Termodinamica 220vAC reverse-cycle air-conditioning and heating system with 215,000 BTU total combined output

• 49" Sony Bravia TV recessed in dining table • Fusion Apollo Digital receiver with speakers in saloon, flybridge, aft deck and foredeck areas

• Carbon fibre davits with hydraulic lift

• Harken CLR 1200 pop-up electric mooring winches

• Highfield CL460 4.6m aluminium RIB tender with Yamaha 70hp 4-stroke outboard

• Extensive watertoys inventory

• Dive compressor and diving equipment

• Full safety equipment package

Available now and ready for use without the lead time of a new build, JACK is ready for an owner who values sailing quality and elegance and represents a compelling and immediately available option among 75-foot

performance multihull catamarans

Below, she accommodates four outboard-facing double cabins — each convertible to twins — with panoramic sea-view windows, ensuite heads, and individual climate control. The main saloon features a generous lounge and dining area centred around a walk-around bar, opening directly to a wide aft deck with sofas and al fresco dining. Forward sun pads complete the deck layout. Dedicated crew quarters ensure clear separation between owners, guests, and crew. The flybridge serves as both the central sailing station and a relaxed vantage point at anchor.