Accommodations 

The forward master cabin features a centerline king‑size berth, generous lockers, and an adjacent private head. Solid teak tongue‑and‑groove joinery and refined cabinetry create a warm, inviting atmosphere throughout the interior.

The salon is spacious and beautifully finished, offering excellent sight lines through the raised‑house windows. Comfortable seating, gracious curves, and high‑quality joinery define the living area. The galley to port includes premium appliances, while the dedicated forward‑facing navigation station to starboard provides exceptional workspace for long‑range cruising.

Aft of the galley, the full‑size equipment room includes a workbench, tool storage, and outstanding access to major systems including steering, autopilot, heating, and electrical components. Additional conveniences include a washer/dryer, dishwasher, central vacuum system, and robust heating and air‑conditioning systems.

Design Specifications 

• LOA (including sprit): 55' (58' overall)
• LOD: 52'
• LWL: 48'4"
• Beam: 14'9"
• Draft: 6'9"
• Displacement: ~50,000 lbs
• Ballast: ~14,000 lbs (lead)
• Fuel: 400 gal
• Water: 175 gal
• Sail Area (100% foretriangle): ~1500 sq ft
• Construction: Steel hull & deck
• Engine: Yanmar 110HP diesel

Hull & Deck Construction

DELPHINA's hull and deck are fabricated from high‑strength mild steel (minimum 44,000 PSI yield) with plating thicknesses ranging from 1/2" at the keel bottom to 3/16" on hull sides and 11‑gauge steel on the deck and house. All seams are welded inside and out, and transverse and longitudinal framing contribute to exceptional structural rigidity.

The keel incorporates an integral baffled fuel tank above a sealed, lead‑filled bulb for ballast. A separate propane locker drains overboard, and a watertight forward sail locker provides collision bulkhead protection. Stainless steel fittings support all major deck hardware.

Coating System: The hull was fully sandblasted inside and out, zinc flame‑sprayed, epoxy‑coated to 20 mil thickness, faired, and finished with Awlgrip polyurethane in Off White with Jade Mist Green accents. The deck features Awlgrip Griptex non‑skid. Cockpit surfaces and transom steps are overlaid with teak.

Propulsion System

• Yanmar 4JH110 110 HP turbocharged diesel 1540 hrs NEW 2015
• Mechanical transmission with 2.63:1 reduction
• Stainless shaft with PSS seal and drive saver
• 22" MaxProp Classic
• Racor dual filtration system
• Bow thruster (New 2025)
• Engine instrumentation in recessed cockpit panel
• Halon engine fire system

Steering System

• Whitlock Mamba steering with Premier MkII pedestal
• 52" leather‑wrapped stainless wheel with disengage unit
• Emergency tiller with deck access and aluminum tiller extension

Electrical Systems

• Victron Multiplus inverter/charger with Color Controller
• Northern Lights 5.5 kW generator 233 hrs NEW 2016
• Victron 3600 isolation transformer
• Batteries: 950ah Lithionics house bank, 24V, separate start batteries for engine & genset
• Balmar 140‑amp 24V alternator
• 30A shore power system
• 600W solar array on cockpit arch with Victron MPPT Controllers NEW 2019
• Separate AC/DC distribution panels with marine‑grade wiring
• Comprehensive exterior lighting including navigation, steaming/deck, and cockpit floodlight

Plumbing & Propane Systems

• Pressure hot/cold water via Jabsco ParMax system
• WHALE 11‑gal water heater with engine heat exchanger
• Dual VacuFlush heads with epoxy‑lined tank chamber
• SeaLand pumping system for overboard discharge
• Multiple bilge pumps with counters
• Arid Bilge System
• Marelon seacocks below waterline
• Transom shower, freshwater washdown, Seagull drinking water filter
• Two 20‑lb aluminum propane tanks with Xintex monitoring
• Dickinson Propane BBQ

Interior Equipment 

• Dickinson three‑burner stove with oven
• Danfoss refrigerator/freezer with R50 insulation (New 2019)
• Microwave
• Miele dishwasher
• Splendide washer/dryer
• Beam central vacuum system
• Webasto DBW2010 cabin heating system (six outlets)
• Flagship Marine 18,000 BTU air conditioning
• Hella cabin fans
• Cruise RO 50gal/hr watermaker

Instrumentation & Electronics

• Pedestal‑mounted Ritchie compass (lighted)
• Full B&G suite of navigation electronics
• Chartplotter with B&G multi-displays at Binnacle and Nav station
• Autopilot Controls at Binnacle and Nav Station
• Icom M802 SSB with AT140 tuner
• Starlink Internet

Hatches, Portlights & Ventilation 

• Nine Lewmar Ocean hatches (1 size 70, 9 size 60)
• Oceanair recessed SkyScreens on seven hatches
• Eight stainless opening portlights
• Laminated reflective coated fixed windows (house & hull)
• Five stainless dorade vents
• Teak/acrylic companionway hatch with teak doors

Spars, Rigging & Sails 

• Keel‑stepped aluminum mast with Spartite seal
• LeisureFurl 20/7 boom
• Wire rigging with Norseman terminals
• Dual insulated backstays with hydraulic adjusters
• Running backstays
• Schaefer 4100 headsail furler & 3100 staysail furler
• Forespar rigid vang
• Spinnaker pole with track on mast
• UK full‑batten LeisureFurl main (2014)
• Genoa (2014)
• Spinnaker(2014)
• Staysail (original, rarely used)

Deck Equipment 

• Full Andersen self‑tailing winch package (several electric)
• Harken Black Magic blocks
• Stainless sheet lead tubes integrated into cabin house
• Waterline signature 316 SS toerail
• Heavy‑duty Herreshoff‑style cleats
• 32" stanchions with double lifelines
• Lighthouse 1501 electric windlass with spare motor
• Dual stainless bow rollers with retainers
• Rocna anchor with 425' chain
• Bruce anchor with 250' chain
• Dinghy Davit

Interior Finish

• Polyurethane foam insulation throughout
• Soundproofed engine compartment
• Solid teak joinery and louvered doors
• Teak & basswood cabin sole
• Corian countertops throughout
• Removable headliner
• Custom mattresses on all berths (New 2018)
• Ultrasuede salon upholstery

Additional Equipment & Safety 

• Winslow 6‑man liferaft in Pelican case Serviced 2025
• 406 MHz GPS EPIRB
• Life vests for 10+, including inflatables
• Extensive spare parts inventory

Ready for serious offshore passagemaking or luxurious coastal cruising, DELPHINA represents an exceptional opportunity to own a fully custom, impeccably built Waterline 55 maintained to the highest standards.

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.