Neff Yacht Sales / Used 58 foot West Bay SonShip 58' Extended Cockpit Power - "Alpha Wave"

West Bay SonShip 58' Extended Cockpit

"Alpha Wave"

2004 • 58' (17.68 m) • Power

$999,000 USD

This extrondinary Westbay 58' hull number 84 was originally designed and built for very knowledgeable owners, the custom factory extended cockpit is one example. There is plenty of space for fishing, outdoor dining and relaxing with family and friends.

Alpha Wave offers these hard to find custom features and upgrades:

  • Custom factory extension of the cockpit 1.5' and room for the teak dining tables and chairs for 8 guests
  • Custom Westbay hard top with complete enclosure
  • Sleeping quarters for 6.
  • Second oven in galley
  • Heated marble flooring in both heads
  • Lighted Baitwell/Fish Tank in transom
  • Port and Starboard aft engine controls and hydraulic bow and stern thrusters enhance docking ease
  • Tender fueling station.


Vessel Information

Builder: West Bay
Model: SonShip 58' Extended Cockpit
Model Year: 2004
Category: Power
Sub Category: Motor Yachts, Pilothouse
Condition: Used

LOA: 58' (17.68 m)
Engine Info: Caterpillar 3406 E Direct diesel 800|horsepower Inboard 5 Blade, Alloy 2004 1584 Starboard

Location: Delta, BC CA
City: Delta
Country: CA


Alpha Wave has one of the finest interiors of any yacht of this class. Stepping aboard you are welcomed by the classically nautical design imbued with light and air. The three stateroom raised pilothouse with cockpit and flybridge flows comfortably with spacious gathering spaces and gracious connecting areas. Quarter sawn American cherry hardwoods are employed throughout, all with a lush satin finish and high gloss cabinet accents. Wall covering, fabrics, blinds, carpeting, pillows, bedding and covers are upgraded and are of the finest quality. Closets and hanging lockers are lighted and lined with aromatic cedar. Windows on the main deck are a tinted, heat resistant laminated glass. Living spaces feature opening ports, overhead hatches, or sliding windows for natural ventilation. Alpha Wave has 4 reverse cycle heat and air units and twin Espar heating systems for year round comfort.

The engine room is full standing height and is accessible from the aft deck via full height flip up hatch. The thoughtful layout simplifies maintenance with excellent accessibility to all components. Staterooms are accessed via a gradual stairwell forward from the starboard side of the pilothouse.


Step from the teak laid cockpit through the polished stainless doors to the open and airy salon. Great visibility in every direction affords a pleasing atmosphere. A phantom roll screen is fitted on the aft doors and Duette blinds offer unlimited viewing and privacy options. To port is the large U shaped sofa wrapped in luxurious gold and beige chenille. The sofa has been modified to allow storage under the middle and forward sections.

Forward to port is a custom cherry wood bookcase and custom stemware rack above. Forward to starboard is a cherry wood cabinet that houses the pop-up television. All around, the large windows are enhanced with wood blinds in lambrequins. Exotic and rare Sapele pommele wood tops the cabinetry and custom designed coffee table.


Moving forward and up two steps, the welcoming warmth of the classic teak and holly laminate flooring greets you in the galley. The U shaped galley has vantage aft to the salon, a large window with wood blinds to enjoy your surroundings and an uninterrupted view forward to the Pilothouse window. It is efficient in design, layout and storage. The countertops are finished in a light-colored Corian with splash rail, appliances are stainless steel and the sink is fitted with water filtration. The sink is a double stainless basin with a single lever Kohler faucet.

Opposite is the Dinette covered in rich blue ultra leather and capable of seating 4 comfortably at the matching Corian topped table with storage cabinet beneath.

  • GE Profile Refrigerator with brushed stainless steel doors, 22cu ft, fridge over/freezer under w/ice maker. New filter this year.
  • Miele cooktop with 4 ceramic burners and pop-up exhaust fan
  • GE Profile Microwave Convection oven
  • Panasonic 1100 watt Microwave
  • Miele Incognito dishwasher
  • Insinkerator Instant hot and cold water with filter
  • Broan Trash Compactor
  • Stainless Steel Sink, dual basin, under mounted
  • Kohler Faucet, brushed metal with pullout spray head
  • Wine Cooler, Danby Millennium, 17 bottle, in lazarette
  • Freezer, Danby 4.7 cu ft, in lazarette
  • Under counter Tundra Refrigerator, flybridge and Freezer in cockpit

Master Stateroom

The midship master takes full advantage of the beam of the boat. The centerline queen sized bed is also outfitted with storage drawers beneath. Two swing arm reading lamps and a beveled mirror are above, on the aft wall. Silk Roman shades over the port lights and rope lighting and dimming switches offer numerous lighting options. Custom designed American cherry wood cabinets provide greatly expanded full wall storage above copious drawers to starboard. There is a vanity with stool and wood wrapped mirror sited along the forward bulkhead. There are two cedar closets and a Whirlpool stacked washer/dryer with convenient soap shelf. Lighting controls are on each bedside and there is a Furuno multi function display and stereo controls on the starboard side. A 22" wall mounted flatscreen television, satellite TV receiver and DVD player are subtly stowed in starboard cabinetry.

Forward Stateroom

A centerline queen berth has innerspring mattress, upgraded bedspread and pillow shams, and large storage beneath. There is a lighted cedar lined hanging locker with shelf storage, 2 Lewmar overhead hatches with Oceanair screens and night shades, a dresser, mirrored cabinets outboard and mirrored forward bulkhead. A 15" flat screen TV, satellite TV receiver, DVD/VCR and stereo speakers with volume control are fitted in this cabin. There is rope lighting, headboard swing arm reading lamps, and dimmer switches.

Guest Stateroom to Port

Deluxe upper and lower berths are outboard and are fitted with plush innerspring mattresses and upgraded bedspreads and pillows with shams. There is a lighted cedar lined hanging locker and full height storage locker forward with shelves. Reading lights, rope lighting and dimmer switches are fitted.


  • CAT 3406E 800 HP engines w/fuel injection and Caterpillar anti-vibration, noise suppressant mounting for clean and quiet operation
  • Caterpillar Trolling valves
  • Seastar Power Steering system
  • Hydraulic, dual pump 5 zone system:

Muir 3500 lb Windlass with bow, bridge and pilothouse controls

Steelhead Marine 1500lb rotating dinghy davit

Wesmar 10" prop Bow Thruster

Wesmar 10" prop Stern Thruster

Wesmar RS 600 Stabilizers with electric gyro and 6 foot active fins

  • US Watermaker 800 gal/day w/ remote control panel at pilothouse helm
  • Espar Diesel Furnace (2)
  • Caterpillar Integrated Control Heads w/engine and bow/stern thruster controls pilothouse and flybridge helms
  • Caterpillar Integrated Control Heads w/engine and bow/stern thruster controls in swing out cockpit stations, aft port and starboard (2)
  • Hynautic trim tabs, flybridge and pilothouse helms
  • Thermostatically Controlled 2000 cfm engine room blower (2)
  • Rule 2000 12V bilge pumps (4)
  • Kidde FyreWatch automatic fire extinguishing system for engine compartment
  • Fuel tank sight gauges
  • Fuel Distribution Manifold, 6 Valve, for crossfeeding or isolating fuel tanks
  • Deck fuel fills - port & starboard midship
  • Xchanger Oil Changer, 12V, coupled to Generators, Transmissions, and Engines
  • Macerator Pump for holding tank
  • RACOR Dual Fuel pre-filter system w/switching valve
  • Large capacity sea strainer for engines and generators
  • Vacuum System, built-in, w/2 outlets
  • Shore Water Connector with pressure regulator
  • Saltwater Washdown at Bow
  • Freshwater Washdown at Bow, Cockpit, Flybridge
  • Lighted Baitwell/Fish Tank with blue interior and glass face for cockpit viewing, with autofill pump and timer
  • Miele Propane BBQ in cockpit under fiberglass cover
  • Tender fueling station with 40 gallon gas tank and 15 gpm pump on swimstep
  • Kahlenberg airhorn with compressor for inflating toys and driving power tools w/ outlet in stern
  • Whirlpool Stacked Washer and Dryer
  • HART Tank Tender system for fuel & water
  • High water bilge alarms - audio & visual

Electrical System

West Bay has a specialized and high quality AC/DC ships electrical system that incorporates a custom load switching circuit breaker panel to balance both generator and shore power and obtain maximum efficiency. It is further supported by a Yacht-O-Matic automatic electrical source switching system to provide hands off control for switching generators and shore power loads. There are analog meters to monitor AC and DC amps and volts. Low voltage 12 volt LED lighting is used appropriately throughout the boat.

  • 20kW Northern Lights Generator with sound shield and Silent run exhaust system (1640 hours)
  • 12kW Northern Lights Generator with sound shield and Silent run exhaust system (1700 hours)
  • Remote Control Panels for generators on pilothouse helm
  • Yacht-O-Matic Shore Power Management Systems with automatic 120/208/240 volt shore power selector
  • Mastervolt 3.0kW Inverter for house battery bank w/remote control in salon
  • 1200 AH 12V house AGM battery bank with (6) GPL-L16T 2V Lifeline batteries (new 2017)
  • 24V Battery Bank for Caterpillar Electronic Engine Controls w/ (2) H31-DCM 12V sealed deep cycle batteries
  • 24V Battery Bank for Main Engine Starting w 12V sealed cranking batteries
  • 12V Battery Bank for Generator Starting w/ 30H-700 12V sealed cranking battery
  • Manual Battery Watering System
  • 200 Amp 12V Alternator, Starboard Engine, to charge generator start battery and top-off house batteries
  • 40 Amp 12V Newmar 3-Stage Battery Charger
  • 60 Amp 24V Alternator, Port Engine, to charge engine start and control battery sets
  • 15 Amp 24V Newmar 3-Stage Battery Charger
  • Isolation Transformers (2)
  • West Bay Contactor Switching Box containing Programmable Logic Circuit (PLC) for automatic combining and distribution of all AC power sources (Port and Starboard Generators, Port and Starboard Shore Power, House Inverter)
  • Xantrex 1.8kW Inverter for helm computer, entertainment system and Contactor PLC
  • 50 Amp to dual 30 Amp Y Connector
  • 12V Electronics Breaker Panel in pilothouse
  • AC/DC house panel with breakers in salon
  • Red night lights in pilothouse helm
  • Vimar dimmer switches for interior lighting
  • Cruisair reverse cycle air conditioning (4 separate units), Salon: 16,000BTU, Pilothouse/Galley: 2 handlers @ 12,000BTU, Master Stateroom: 12,000BTU, Forward Stateroom: 10,000BTU
  • Glendinning 50 amp 240V retractable 80' shore power cords, aft port and starboard
  • AC Fluorescent and 12V DC halogen overhead lighting in engine room
  • Electrolysis bonding system with zincs and shaft brushes
  • Security System with door/hatch sensors and movement detection

Electronics and Navigation


  • Furuno 1953C/NT 10.4" Navnet Color Radar/Chartplotter/Sounder w/C-MAP NT+ Charts for Puget Sound to Cracroft Island
  • Furuno 6' 12kW Radar on arch
  • Furuno GP-320B GPS Antenna on arch
  • Furuno RD 30 Multi Display (2) for wind, depth and speed
  • Furuno GP-1900C-BB BlackBox WAAS/GPS Chart/VideoPlotter
  • Furuno ETR-6/10N Network Sounder
  • Caterpillar Engine Displays (2)
  • Simrad AP 20 Autopilot
  • ICOM IC-M602 VHF w/remote handset, DSC, built-in hailer RX, and repeat foghorn
  • Azimuth 1000 Compass
  • C-Nav 15" Monitor non-reflective low heat
  • C-Nav 17" Monitor non-reflective low heat
  • Viewsonic 17" External Monitor for camera display-2 cameras in E/R, 2 in cockpit
  • ACR Spotlight Point Pad control
  • Wesmar Hydraulic Stabilizer control
  • Caterpillar Backup Engine Control Panel
  • 12V and 120V outlets on helm
  • TDK External DVD Drive, flush-mounted
  • Brass Chelsea ships clock and barometer
  • Simrad Computer for Chart Plotter, Control on PH Dash
  • Navionics Vector Charting


  • Furuno GP1900C/NT 10.4" Navnet Color Radar/Chartplotter/Sounder
  • Furuno GP-320B GPS Antenna on arch
  • Furuno RD 30 Multi Display, for wind depth and speed
  • Caterpillar Engine Displays (2)
  • Simrad AP22 Autopilot Remote Unit
  • ICOM IC-M502 VHF, w/DSC
  • C-Nav 15" Monitor non-reflective low heat
  • ACR Spotlight Point Pad control
  • Wesmar Hydraulic Stabilizer control
  • Shakespeare 16' VHF Antennae (2)
  • Shakespeare 4' Cellphone Antenna on arch
  • Ultrasonic Wind Sensor on arch
  • 12V and 120V outlets on helm

Master Stateroom:

  • Furuno RD 30 Multi Display for wind, depth and speed
  • Panasonic PBX/intercom w/phones at pilothouse, salon, master and forward stateroom


Main Salon:

  • Samsung 42" LED TV
  • 37" Hitachi Plasma TV on mechanical lift
  • KVH Tracvision M7 Satellite TV Receiver w/HD Conversion Kit, antenna on arch
  • Denon AVR Surround Sound receiver & amplifier
  • Denon DVD/CD player
  • Panasonic VHS Tape Player
  • Denon iPod connector
  • Alpine sub-woofer with amp
  • Niles Speakers (5)
  • XBOX with 4 Controllers
  • Handheld Programmable master remote control
  • Security System Interface Screen
  • Phone and Cable shore connectors at starboard swim platform


  • Niles Speakers (2) with volume control


  • Alpine AM/FM stereo CD player
  • Bazooka waterproof speakers (2) with Niles volume control
  • XM Antennae (2) on arch
  • Glomex TV Antenna on arch
  • Broadband Express WiFi Antenna on arch


  • Bazooka waterproof speakers (2) with Niles volume control

Master Stateroom:

  • Panasonic 22" HD Flatscreen LCD TV
  • Sony HD Satellite TV Receiver
  • Panasonic DVD Player
  • Niles Speakers (2) with volume control
  • Security System Interface Screen

Forward Stateroom:

  • Panasonic 15" Flatscreen LCD TV
  • Sony DVD/VCR Recorder/player
  • Sony HD Satellite TV Receiver
  • Niles Speakers (2) with volume control


At the same level as the Galley and Dinette and warmed by elegant teak and holly flooring, the Pilothouse is centered around the curved console with navigation and full engine instrumentation and engine controls. To port is the chart area with red adjustable position work light, chart drawers and storage beneath. Helmsman chair is a leather covered Stidd seat. Windows are kept clear when needed by three multi speed, marine grade windshield wipers and washer with air defrost system. Port and starboard pilothouse access is through flush fit aircraft-style sliding doors with roll-away Phantom screens.


Entering from the port side swim platform door, the extended cockpit is 18" larger than other West Bay 58's and easily accommodates the set of a dining table and 8 teak folding chairs with canvas cushions in navy with tan piping. Two vented storage lockers are outboard to aft port and starboard. Swing out panels to control engine and bow and stern thrusters are tucked away in both port and starboard lockers. There is a sink and cabinet to starboard of the salon doors, and a Miele electric barbeque grill to the port of the salon doors. There is a hand held hot and cold shower at the transom. Bazooka waterproof speakers with volume control, overhead floodlight in the overhang and courtesy lighting down low. Forward to port is the ladder and hatch to the flybridge.

The transom incorporates the glass-faced lighted Baitwell/Fish Tank which is equipped with autofill, pump & timer. There are fishing rod holders for up to 8 rods securely mounted in the engine room plus 4 fish rod holders overhead. There is a tender fueling station with 40 gallon storage tank and 12 volt pump station. Fender storage is in a fiberglass locker. Stainless steel stern tie and towing bits with stainless steel hawse holes are incorporated into port and starboard wings. There are 5 removable robust N handrails along the expansive teak covered swim platform.

Master Head

The ensuite master head runs fore and aft along the port side. The vanity top is Corian with a designer vessel sink of blue glass and California Faucets dual lever faucet and spigot. Aft is the shower stall with clear door and single lever Brizo showerhead with hand held spray head. Forward is the Vacuflush freshwater toilet and a heated brass towel holder. The medicine cabinet is finished with beveled mirror doors. The headliner is a fitted mirror and there is a ventilating fan. Marble tile floors are upgraded to include a luxurious NuHeat in-floor heating system.

Guest Head

Located opposite the port Guest Stateroom with Corian topped vanity, designer blue glass vessel sink and California Faucets dual lever brass faucet and spigot, beveled mirrored medicine cabinets. VacuFlush freshwater toilet, ventilation fan, fitted mirrored headliner and storage cupboard below the vanity. There is shower with clear door, a towel warmer and a deluxe NuHeat in-floor heating system.


Accessed directly from the pilothouse via a graceful floating staircase or by ladder from the aft cockpit is an unusually large area with console forward for navigation and instrumentation. A robust stainless steel tube rail is fitted with the tinted Venturi. There are two cushioned helm chairs that have been newly upholstered and each with Stamoid fitted covers, and aft is a large L-shaped settee to port with a robust dual pedestal adjustable height table for outdoor dining. Nautical stripe Sunbrella fabric on settee. Westbay custom hardtop and Mastercraft enclosure with new cover on the tender. The yacht tender is sited aft with a Steelhead power rotating, tilt and extension 1500# davit system. This rugged center console Novurania is highly customized and seriously equipped for for fishing, wakeboarding and sightseeing excursions. Complete with new Stamoid weather covering.


The white hull is vacuum bonded hand laid fiberglass with 1" Divinycell on hull sides. There are Fiberglass core stringers, and osmosis protection is provided below the waterline. The deck is cored as are all bulkheads. Barium filled foam composite laminate in engine room bulkheads and overhead provides superior sound insulation. Boot stripe is 2" navy Imron paint and bottom was bottom painted in Spring 2009. The hull is protected with a rub rail capped with a stainless steel striker. All hand rails and rail fittings are 1 ΒΌ" 316 Stainless. There are 12 cleats - 4 bow, 2 stern, 4 spring line and 2 flush pop-out on swim platform. An anchor platform with bow roller is fitted on the foredeck. Propeller shafts and hydrodynamic rudders are stainless steel.

The cockpit floor is laid teak sole and varnished teak cap rails on bulwarks. A port side door opens to the swim platform with 5 removable stainless steel N handrails and an extra set of receptacles. Even when sea conditions are challenging, the West Bay 58 hull form has proven to provide a quiet and stable ride underway and at anchor.

Other Features

Switlik 6 man life raft

  • Extensive additional custom cabinetry for parts storage and shelving in lazarette
  • Toolbox - Kobalt 5 drawer in lazarette, full suitcase of tool over starboard
  • 2 x 50' dock lines
  • 2 x 25' dock lines
  • 8 fenders with custom fender hooks
  • Boathook
  • USCG approved handheld fire extinguishers (4) plus Kidde FyreWatch in engine room
  • Teak flagstaff
  • Stainless Steel burgee staff
  • Port and starboard custom wood binocular holsters at Pilothouse helm
  • Owners manuals with schematic drawings for all systems
  • Custom mounting system for cockpit dining chair stowage
  • Fishing rod storage racks (2) in engine room for 8 rods
  • Stainless Steel rod for hanging wet clothes to dry, mounted along central ceiling in engine room
  • Engine room workbench with vise
  • Suncovers for windshield and pilothouse doors (new 2021)

14' Novurania Tender w/60hp Yamaha 4-Stroke Outboard

Rugged center console Novurania is highly customized and seriously equipped for for fishing, wakeboarding and sightseeing excursions. Complete with Stamoid weather covering.

Stainless Steel Arch with:

  • Spot/search light
  • Fishing Rod Rocket Launchers (4)
  • Scotty Downrigger platform and mount, starboard and port, with 12V outlets (2)
  • Shakespeare 3' VHF Antenna

Center Console with:

  • Furuno GP-1850WF Color Chartplotter/Sounder
  • Furuno GPA-017 GPS Antenna
  • ICOM IC-402S VHF Radio
  • Raw Water Washdown pump and hose

Downrigger weight holder (2) in stern

Stainless Steel Grab rail and Cleat on bow

Stowage under bow, center and aft seats along with foot pump for inflating pontoons

Custom removable dinghy chocks on upper deck of yacht

Alpha Wave Spares

  • Engine and generator spare fuel and oil filters, impellers, belts
  • Engine oil, transmission oil, hydraulic oil, steering oil, coolants
  • Thruster zincs, engine zincs
  • Generator raw water pump
  • Spare bilge pump
  • Electric crab pot cooker
  • Lubricants, sprays
  • Water hoses, spray nozzles, hose connectors, clamps, filters, brushes
  • Cleaning supplies, brushes, shop vac
  • Tote storage bin with spare stainless clamps, nuts and bolts, screws
  • Tote storage bin with spare electrical parts, fuses, tyewraps, light bulbs
  • Tote storage bin with spare lines, holders
  • Tote storage bin with spare tapes, glue gun, sealants, velcro
  • Tote storage bin with sandpaper, shelfliner sheets, handheld air horn
  • Tote storage bin with bungee cords, string, rope and clamps
  • Tote storage bin with cable locks, air horns, jumper cables, shop vac filter
  • Towing bridles,dock lines, sea anchor
  • Various shore power electrical adapters
  • Extra tender air pump
  • Dockside portable water filter kit
  • Portable Heating


ALPHA WAVE has been designed to take her owners cruising year round in comfort and style. One of the most highly upgraded West Bay SonShip 58s, this yacht exudes welcoming warmth, sophistication and an eye for detail. ALPHA WAVE is a perfect delight to tour and will impress you during the inspection and sea trial process and bring endless cruising enjoyment.


All personal gear; kayaks; loose items; galley gear; tools; supplies & items not specifically listed on equipment list specifications sheet.


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.

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