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Seller's Description

S/V Kyrie is a 1983 Prout Snowgoose 37 Classic for sale by owner. Completely refit in 2003 and continuously updated since.

Our beloved home and adventure platform is now on the market as our 4year cruise is now complete. She is in solid condition with easily maintained and robust systems throughout with many redundancies in place to keep you going if something fails. Many spare parts, rebuild kits, and emergency repair parts included for all major systems.

As is expected with her pedigree, she is robustly built, extremely seaworthy, and has already completed one circumnavigation prior to her 2003 refit. There fit was incredibly thorough with new sails, rig (since replaced again), new engine, new insulated headliner, new diamond sea glaze exterior windows, new cockpit custom roof and solar. All systems are installed with thought for ease of maintenance and serviceability.

Kyrie has been fully upgraded with everything you need for remote self-sufficient life on anchor, making your own power from the sun, and desalinating your drinking water onboard. Her systems are all thoroughly tested and proven, with full time use for a family of 5 onboard.

These boats are renowned for their build quality, beachability, extremely shallow draft, short mast, and good sailing manners. She is a perfect boat for the ICW, great loop, Bahamas, Keys, or a circumnavigation. Offered by Beaufort Yacht Sales.

Equipment: Completely re-rigged professionally, including chain plates 2019. Sillette Drive Completely rebuilt in 2020. 560AH Lithium LIFEPO4 main battery bank with bluetooth BMS installed new in 2021 New Solar (750W) and Victron MPPT controllers 2019. New Main Charger (Sterling ProPower 60A) in 2021. New salon cushions 2022. Completely Rebuilt Watermaker 2021; New Membrane 2022. New AIS (Vesper XB-8000) 2018. New Spinnaker 2021; ATN spinnaker sock new 2019. All sails UV covers professionally replaced 2021. anmar 3GM30, approximately 2500 hours. Silette drive, fully rebuilt in 2020 (completely new internals) with approximately 800 hours. Standard Lead-Acid start battery isolated from main battery bank. Runs perfectly, lots of spares on board for everything (alternator, starter, gasket set, etc). Automatic Fire Extinguisher installed in engine compartment Vesper XB-8000 AIS works easily with your tablet, phone, or computer to send GPS and AIS data. Silva Nexus sailing instrument set, with wind, wind direction, depth, water speed, etc. Currently paddle wheel sensor for through the water speed is not functional, meaning wind only shows apparent angle and apparent speed. Spare masthead anemometer. Nexus autopilot (hydraulic) works perfectly Cetrek autopilot (hydraulic backup unit) fully installed and was working when decommissioned 1 year ago. Needs power reconnected (2 wires) and a new rudder angle indicator to be fully functional. Radar: Raytheon Pathfinder SL70 GPS: Garmin GPSMAP 215 with chart chips for majority of the West Coast USA & Canada Compass: Plastimo Contest 130 Depth Sounder: Hummingbird Depth Sounder 2: Uniden Fixed VHF: ICOM ICM502 with remote Commandmic II at helm Handheld VHF: Standard Horizon HX290 SSB: ICOM ICM710RT with Pactor 3 modem, unlocked for HAM frequencies controllable with computer over USB. Standard running lights are incandescent; sailing running lights are LED for power savings. EPIRB GlobalFix V4 with user replaceable battery New 2018. Full jackline system included with (4) manual inflating life vests with built-in harnesses. One life jacket as AIS PLB installed (good till 2025)



Prout & Sons
# Built


Length Overall
37 0 / 11.3 m
Waterline Length
33 0 / 10.1 m
14 11 / 4.6 m
2 11 / 0.9 m
12,130 lb / 5,500 kg

Rig and Sails

Reported Sail Area
570′² / 53 m²
Total Sail Area
Sail Area
Air Draft
Sail Area
Forestay Length

Auxilary Power

Fuel Type
Fuel Capacity
35 gal / 132 l
Engine Hours


Water Capacity
75 gal / 284 l
Holding Tank Capacity


Hull Speed
10.0 kn
Classic: 7.7 kn

Hull Speed

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.


Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL

9.98 knots
Classic formula: 7.7 knots
Sail Area/Displacement
16-20: good performance

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.


SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
<16: under powered
16-20: good performance
>20: high performance

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.


Ballast / Displacement * 100

<40: less stiff, less powerful
>40: stiffer, more powerful
100-200: light

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.


D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
<20: lightweight racing boat

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.


Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
>2.0: better suited for coastal cruising

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.


CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
<2: better suited for ocean passages
>2: better suited for coastal cruising


Early hulls, which include molded stub keels, are solid fiberglass, while more recent versions are solid below the waterline and cored above.
A later version became the SNOWGOOSE ELITE (1986) had 1 foot more beam.
The SNOWGOOSE 37 (all iterations) was enormously popular with more than 500 built.

This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.

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