Custom Roake 50 (Guatemala)

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Asking: $325,000 (USD) Location: Rio Dulce (Guatemala)
S/V Panta Rhei is a Rio Dulce based 2012 Custom Roake Guenter 50 Catamaran For Sale By Owner
This catamaran owner requires financial settlement only. No trades.
This seller is open to offers via CatamaranSite escrow.

S/V Panta Rhei is a 2012 Custom Roake Guenter 50 catamaran, for sale by owners.

The design concept for Panta Rhei was formulated in 1981. We wanted a fast sailing catamaran with comfortable but minimal accommodation capable of cruising the oceans of the world and at the time couldn’t find anything that suited our needs. The design and construction of Panta Rhei was an evolution that occurred over a number of years and involved a cast of naval architects, a variety of construction methods that at the time were cutting edge technologies, and the development of novel approaches to implementing the smooth working of all components. A brief history may help in understanding the boat’s evolution.

Panta Rhei has been our only home since 2014 and part time prior to that. While we never did sail the oceans of the world as hoped, we cruised extensively from Nova Scotia to the Bahamas and throughout the Caribbean. During that time, Panta Rhei proved her sea keeping abilities, potential for speed and ease of handling. She is a capable world cruiser and all that has prevented us from venturing further afield is our advancing maturity and health considerations.

While Panta Rhei will not appeal to those who desire a spacious catamaran suitable for families or entertaining, she is perfect for an individual or couple who is minimalist in accommodation needs, wants the option for speed and who appreciates safe and easy sailing.

Although vessel construction was initially completed in 1991, original trials indicated that the hulls were improperly designed. This was discovered when the vessel was motored, round trip, from Halifax to North Carolina. After that, the vessel was not used until new hulls had been designed, built, and installed in 2003. In 2004 the vessel was motored to Merritt Island, Florida where it was hauled. The vessel remained there while being finished. Panta Rhei was launched and sailing trials took place June 2012.

The vessel’s current hulls  were designed by Richard Roake, N.A.; the center cabin together with the forward and aft transverse beams were designed by Robert Harris, N.A. and is all that remains of the original build; and the unstayed rotating mast and boom assembly was designed by Eric Sponberg, N.A. All of whom have extensive experience with design and construction of sailing catamarans. A full boat lightning protection system was designed by Dr. Ewen Thompson of Marine Lightning Protection and incorporated in the build.

The concept of a free standing rotating rig was originally inspired by the Aerorig design. Panta Rhei’s custom version was developed to allow the boom to rotate around the mast which, with the airfoil fairing, acts as a clean leading edge for the main sail. This allows sailing close to the wind and tacking while using only the mainsail. The self tacking jib attached to the forward end of the boom rotates with the rig and does not require tending once the traveller car is set. For downwind sailing the rig can be rotated square to the wind.

Whether it is rocketing down a 8-10 foot wave with a double reefed main in a 25 knot following wind or just cruising along at 10 knots in a light breeze; the autopilot handles steering flawlessly while you relax and keep watch.  Once the jib and main sheet are set, you can tack with ease by putting the helm over and  adjusting  the mast rotation.  The boat is easily handled by one person.

Panta Rhei is of cored composite construction, vacum bagged and infused with epoxy resin. Each hull is composed of three water tight compartments, each with its own access hatch. There is a collision bulkhead at each bow.  Hulls are used for tankage, stowage and vessel systems. A carbon fiber daggerboard is located in each hull within a watertight trunk. Kickup rudders are transom mounted and can also be retracted manually. The 10” diameter tapered carbon fiber mast was manufactured by Composite Engineering of Concord, MA and a laminated composite airfoil fairing added by the vessel builder.

All accommodation is in a central cabin located between the two beams. The cabin is a watertight entity separate from but supported by the hulls. There is 2 1/2 foot clearance between the cabin bottom and the water at the forward beam and 1 1/ 2 foot clearance at the aft beam. The cabin bottom is radiused which reduces pounding significantly. The cabin door and all hatches have gaskets and can be dogged. The cabin is also fitted with an escape hatch. A shallow water retractable leeboard is mounted on the starboard side of the cabin. The combination of the leeboard and kickup rudders allows access to very shallow anchorages.

The cabin interior has standing headroom (6’ 3”) as you enter from the cockpit to the head, communications area, chart table and galley. There is seating for four on bench settees at the dinette table. A pilot berth with a foot tunnel is located on each side of the cabin. Forward is the thwartship double berth with sitting headroom on the berth. The mattress is mounted on a Froli spring system that is hinged and raises for access to a large storage area under the berth. Storage in the cabin is adequate but without traditional cabinetry.

Netting between the hulls and between the hulls and cabin are vinyl coated polyester. There is a solid platform aft of the cockpit which supports the dinghy and its rack while underway and provides a pleasant “back porch” at anchor. Areas below the waterline are painted with Coppercoat. Topsides are Awlgrip and the decks, cabin top, beam topsides, back porch and cockpit are finished with a robust nonskid product (Soft Sand).

Catamaran Name:S/V Panta Rhei
Model:Guenter 50
Year Built:2012
Builder:W.A. Guenter Boatbuilders, Nova Scotia, Canada
Designer:See Description
Construction:Composite - fiberglass, kevlar, balsa coring with epoxy resin infused under vacuum. Carbon reinforced beams.
Loa:51 ft
Lwl:50 ft 5 inches
Beam:25 ft 10 inches
Headroom:6 ft 3 inches
Draft:4ft 6 inches boards down; 1 ft 6 inches boards up
Displacement:20,000 lbs
Mast Height:64 ft 10 inches
Bridgedeck Clearance:Radiused profile - 2 ft 6 inches forward; 18 inches aft
Speed:Under sail up to 19 knots; under power 4.5 - 5 knots
Fuel Tanks:75 gallons
Water Tanks:60 gals tankage - water maker installed
Holding Tanks:36 gallons
Galley Location:Up
Engines:1 Yanmar 2GMF driving Sillette Sonic outdrive
Engine Hours:3723 hours; top end overhaul at 2725 hrs
Fuel Consumption:1 gal per hour cruising speed engine only
Sails:All sails by Doyle Offshore.
* Mainsail: - 736 square feet
* Roller Furling Jib - 295 square feet
* Screecher - 800 square feet, not currently rigged
* Doyle Cradle Cover with lazy jacks

Layout Diagram

Catamaran Inventory


  • The free standing rotating rig allows the boom to rotate around the mast and is a key feature that makes Panta Rhei unique
  • 62 foot, 10" diameter tapered carbon fiber mast manufactured by Composite Engineering of Concord MA
  • Laminated composite airfoil fairing on mast
  • Harken sail track and batten car system
  • Single carbon fiber boom
  • Harken radiused jib traveller mounted forward of mast on boom
  • Custom upper and lower mast bearings engineered and manufactured by Harken allow full rig rotation
  • HDPE boom bearings (upper and lower) allow boom rotation around the mast
  • Rig rotation controlled from cockpit by main sheet
  • Boom rotation around mast is controlled from cockpit by lines
  • No need for standing rigging
  • Assorted yacht braid rigging sizes for main halyard, spare main halyard, jib halyard, screecher halyard
  • Assorted yacht braid rigging sizes for main sheet, screecher sheet, jib sheet
  • Assorted yacht braid rigging sizes for preventer, outhaul, first reefing line, second reefing line, boom rotator


  • All sails by Doyle Offshore
  • Mainsail - 736 square feet 10.62 oz dacron, 5 full length batten pockets
  • Antel main headboard
  • Harken batten cars and track
  • Jib - 295 square feet, 8 0z dacron top down roller furling
  • Screecher - 800 square feet, 253 square weave dacron roller furling Profurl
  • Doyle Cradle Cover with lazy jacks

Engines / Mechanical

  • Single Yanmar 2GMF 18 hp diesel engine installed centerline beneath cockpit sole in a dedicated, sound deadened compartment
  • Engine compartment easily accessed through lifting cockpit sole hatch
  • FRP engine bed stringers; flexible engine mounts
  • SS pan lining the bottom of the engine compartment
  • Mechanical single lever/cable type throttle controls by Teleflex on single pedestal station in cockpit
  • Raw water cooled wet exhaust exiting starboard of the drive with stainless steel fittings
  • Kanzaki transmission
  • Sillette Sonic drive with 14" 3 blade propeller.
  • Manual hydraulic cylinder located aft cockpit starboard side used to retract Sillette drive while sailing
  • Sillette Sonic drive is steerable and controlled from pedestal steering station
  • On water access to Sillette drive through hatch in back porch


  • 4 through-hulls and seacocks (2 raw water inlets, water maker supply, holding tank discharge)
  • 2 raw water inlets with strainers - 1 in each hull (aft main) compartment
  • Raw water manifold under cockpit sole hatch which serves all raw water applications - engine, deck, domestic
  • Pressurized freshwater system. 12 volt Shurflo pump (on demand 2 gal/min) Located starboard main hull compartment
  • FW to galley sink - 1 facet direct from water tank; second faucet has Sea Gull IV filtration
  • Isotherm 221 hot water heater installed but not plumbed. Located in galley locker
  • 2 x 30 gallon Kracor HDPE water tanks mounted and secured starboard main hull compartment. Each with deck fill directly above tanks
  • Spectra Cape Horn Extreme reverse osmosis watermaker installed starboard main hull compartment
  • Dedicated raw water supply seacock for watermaker starboard hull amidships
  • FW shower/wash down in aft face of aft beam
  • SW wash down at anchor platform
  • High volume portable manual bilge pump (Whale Gusher) with brass strainer on 6 ' long 2" diameter intake hose
  • 2 - 36 gallon Kracor polyethylene permanent fuel tanks mounted and secured in port hull main compartment
  • 1 - 5 gallon fuel day tank located in aft beam
  • Deck fills located directly above each tank
  • Fuel polishing system with Racor 500 filter installed in port main compartment
  • USCG Marine Sanitation Device type III
  • 1 - 36 gallon Kracor HDPE waste holding tank mounted and secured in starboard main compartment aft
  • Deck plate for pump out topside; below water discharge bronze ball valve
  • 2 - 20# aluminum LPG tanks in vented propane lockers located in forward beam at mast step

Deck Equipment and Fittings

  • Stainless steel double anchor roller and rack
  • Simpson Lawrence V2000 reversing vertical 12volt windlass with chain gypsy and capstan
  • Foot switches for windlass
  • Windline stainless anchor stopper for primary anchor
  • 2 stainless steel anchor chain tensioners, one each mounted anchor
  • 4 - 4 x 10" open stainless mooring cleats (1 each bow and stern)
  • 4 - 4 x 8" open stainless mooring cleats ( 1 each bow and midships)
  • 14 ss padeyes
  • 2 Harken 48 self tailing sheet winches at cockpit
  • 2 Harken 40 self tailing halyard winches at mast ( 1 each side)
  • Misc blocks (Harken, Schaefer, Ronstan) fairleads and jammers (Lewmar D2)
  • 2 - 1 inch ss tubing grab rails mounted along each side of boom
  • 2 - 1 inch ss tubing grab rails full length of cabin top, each side
  • 2 - 1 inch ss tubing hand grabs aft each hull at transom
  • 2 - 1 inch ss tubing hands grabs at top of hardtop each side
  • 1 - 1 inch ss tube hand grab at front of mast above mast/forward boom intersection
  • 4 - 4 inch steps - one each side of cabin forward and aft
  • 2 welded anodized aluminum mast base platforms with safety stanchions, rotate with mast
  • 1 welded aluminum outboard motor hoist mounted on hard top aft starboard side
  • 1 welded aluminum dinghy davit/rack mounted aft deck platform
  • 1 ss outboard motor rack mounted starboard aft beam
  • 1 ss retractable swim ladder mounted starboard transom
  • 1 detachable ss swim ladder mounted aft port hull

Cabin Exterior / Cockpit

  • Cockpit hinged storm door engineered and manufactured by Bomar has rubber gasket and 5 storm dogs
  • Retractable screen installed for cockpit opening
  • Watertight escape hatch with easy access under chart table - Goit
  • Watertight opening overhead hatch in cabin roof - Goit
  • 9 opening watertight portlights - Goit
  • 24" wide plexiglass section full width of hardtop for viewing the sails
  • Front hardtop has 4 strataglass panels
  • The centre two strataglass panels can be unzipped and snapped to the overhead to improve ventilation
  • Clear forward view over cabin top from helm station
  • Doorcap wind scoop for main overhead hatch - excellent ventilation at anchor
  • Sunbrella sun awnings mounted on track each side of boom roll down for use at anchor or dock
  • Sunbrella sun / privacy curtains mounted on track each side and back of hardtop. Great for showers on the back porch!
  • Sunbrella and strataglass cockpit enclosure (sides only for wind protection)


  • Engine driven 160 amp alternator by Ample Power Company
  • 2 Lifeline GPL-8DL batteries - 12 volt 255 amp hours each (Mar 2020)
  • Main battery switch on/off
  • 4 solar panels - 100W each 2 mounted on hardtop and 2 on bracket attached to aft end of hardtop
  • Ample Power Company Bank Manager II
  • Balmar 614 Alternator Regulator - MC-614
  • Balmar SG200 battery monitor
  • Rogue MPT - 3024 Photovoltaic Charge controller
  • True Power 600 watt 12v DC to 110v AC power inverter installed in cabin
  • Professional Mariner ProSport 20 plus for AC battery charging. No other AC power system on vessel

Cabin Interior

  • Cabin interior basic dimensions14 feet long 9 feet wide
  • Lavac Popular manual head
  • Full size chart table
  • Navigation and communication station immediately upon entrance
  • Frigoboat keel cooled refrigeration plus air cooled option
  • Large well insulated chest refrigerator located under chart table
  • Separate portable Engles fridge/freezer for longer term food storage is wired in starboard main compartment
  • Double stainless steel sink
  • Force 10 2 burner stove and oven with broiler
  • SS warming shelf added outboard of stove top
  • SS heat shield on bulkhead next to stove
  • Xintex S-2 propane monitor and control
  • Dinette table with folding leaves sits 4 comfortably
  • Mounted track for table allows moving it for free access to berth
  • Thwartships double berth on Froli springs
  • Settees convert to pilot berths
  • 2 Alpenglow LED overhead lights - 1 each side
  • 3 Alpenglow LED swivel reading lights - 1 each settee and 1 berth
  • 1 Fautasi 18 LED light assembly - galley
  • 1 LED overhead in head
  • 3 x 4" box fans -2 mounted, 1 moveable
  • Port light mountable extraction fan for longer term marina use
  • Removeable noseeum screens for all ports
  • Removeable privacy screens for all ports

Electronics and Navigation

  • Ritchie Powerdamp Plus 3 1/2 " compass
  • HF Marine Icom M802 SSB transceiver with AT-140 Automatic Tuner
  • KISS - SSB ground plane system
  • TGE N8XJK boost regulator for above
  • SCS P4 Dragon DR-7400 pactor modem
  • Icom IC - R75 receiver
  • Meteoman digital barometer
  • SR-161 AIS receiver
  • AM43 NMEA 0183 multiplexer for network 0183 data for AIS and GPS
  • Raymarine C125 Multifunction display with Seatalk NG network
  • Raymarine radar - 18" HD Digital Radome SL72 Plus
  • Autopilot - Raymarine SmartPilot SPX 30 course computer; ST8002 SmartPilot Controller; Raymarine Rotary Drive M81136 Type 2
  • Autohelm ST50 Depth display with rocker switch to toggle between depth under each hull forward
  • Airmar in hull depth transducers forward in each hull
  • Raymarine / Tacktick micronet wireless interface display at helm station connected to aft port hull depth sensor and wind sensor
  • Raymarine T101 mast head wind sensor
  • Windex masthead wind indicator
  • Standard Horizon Matrix GX 2000 VHF with loud hailer / fog signal
  • Hella Marine NaviLED Pro navigation lights - bicolour, steaming light, stern light, anchor light (2 or 3NM visibility)

Anchoring and Docking

  • Primary anchor - 55 lb Spade mounted with 160' high tensile 5/16" chain with Mantus swivel; 30' anchor bridle with Mantus chain hook
  • Secondary - 20 kg Bruce mounted with 30' high tensile 5/16" chain; rope rode; anchor bridle with options of chain hook or spectra loops Fortress FX-37 stowed in port forward compartment
  • 10 kg Bruce used for dinghy or kellet stowed in port forward compartment
  • Colligo Storm Swivel (allows use of 3 anchors)
  • Para Tech 72" Delta Drogue with 5/8" nylon braid bridle and rode, 3/8" stainless steel shackle in bag
  • Para Tech 24 ft Parachute Sea Anchor in deployable bag; 5/8" nylon bridle and rode with 5/8" ss swivel, 1/2 " ss Shackle and trip line
  • Standard set dock lines
  • Various spare rodes
  • A variety of fenders in different sizes and shapes
  • Fender board


  • Radar reflection built into mast fairing provides good radar return
  • Well placed grab rails along cabin top, boom, hardtop and mast
  • Emergency tiller
  • Spare rudder
  • Robust padeyes at strategic locations for jacklines and clipping in safety lines
  • Aggressive non skid on decks, beams, section of hardtop and area on forward beam at mast
  • ACR GlobalFix iPro 406 MHz GPS EPIRB
  • West Marine handheld vhf radio
  • Icom IC-M25 handheld marine vhf radio
  • Xintex marine carbon monoxide alarm in berth area
  • Xintex S-2 propane monitor and controller in galley area
  • Fire extinguishers - 2 - 5 lb Fireboy Marine Halon 1211
  • 1 fire suppression blanket in galley area
  • West Marine 1300 lumens waterproof rechargeable LED spotlight
  • Guest 12v searchlight with cockpit plug
  • 30" diameter AeroBuoy life ring
  • ACR SM-3 Lifebuoy self-igniting light attached to life ring
  • Lifesling 2 overboard rescue system
  • Throwbag with 50' floating line
  • Float with 50' of floating line
  • Jacklines
  • 4 safety tethers with Gibb ss gated hooks
  • 2 Xenec personal strobe lights
  • Lifejackets
  • Flares


  • Rigid 11 ft carbon fiber and Corecell, epoxy resin infused dinghy
  • Awlgrip finish with non skid sole
  • Taylor brand gunnel guards
  • Yanmar 8hp outboard, 2.5 gal fuel tank and hose
  • Canadian licensed pleasure craft


  • Autohelm handheld digital compass
  • HawkEye handheld sonar depth indicator
  • 2 Sena bluetooth boom headsets ("marriage saver")
  • 2 boat hooks
  • Binoculars
  • A multitude of spare parts for almost all systems as well as a large supply of fasteners

Catamaran Photos