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Among pilothouse sailboats, the Nauticat 37 is considered one of the best designs with an attractive profile and roomy interior while offering respectable sailing performance. Solidly built in Finland in 2003 by Nauticat Shipyard (previously Siltala Yachts) in high-quality European workmanship reputed to be comparable to Halberg Rassy in build-quality and joinery. Three Rivers is a comfortable blue water sailboat ideal for extended cruises or live-aboard. Her large pilothouse with a raised saloon provides a bright living space with excellent all-around visibility, also perfect for keeping watches and navigating in the open seas in safety and comfort. Featuring a large aft-stateroom, a V-berth, and two heads, a saloon and galley, the NC37 has comparable living space as many 40 footers. She has been diligently maintained and is in very good condition, with many recent upgrades and refurbishments. The boat is currently lying in the Atlantic side of Panama at Shelter Bay Marina, an excellent resort-grade full-service marina near the entrance of the Canal. I have owned 3Rivers for three years and have enjoyed this excellent cruising area. However, my plans have changed and 3Rivers is in turn-key condition for a new owner to enjoy the beautiful cruising grounds of the Caribbean.
For more pictures, see: https://photos.app.goo.gl/khmnczf48KFbv9J36
Equipment: Engine * Yanmar 4JH3E 2-liter 56hp 4-cylinder diesel, fresh water cooled, with electric 100% duty-cycle fuel priming pump (2023). Engine control from both cockpit and pilothouse. New start/stop switches at cockpit pedestal (2023). Engine Hours Approx. 2600 hours, well maintained. Runs well, starts easy, runs with no fume. Cruise speed 6 knots at about 2200 rpm. * Propeller: 3-bladed folding prop with rope-cutter * Bow thruster Sleipner SP95T Electrical * Batteries 2 x 225Ah AGM house bank (2023), 1 x 90Ah AGM engine start with smart isolator (2024) * Battery charging 80 amp engine alternator * 2 x 415W solar panels via Epever 40 amp MPPT controller w. remote panel (2024) * Silentwind Wind Generator, with Hybrid 600 controller * Vitron Multiplux 12/2000/80 Charger/Invertor, battery monitor Water System * 12 Volt Pressurized water system * Water pump Jabsco Par-Max 2 * Hot water Isotemp water heater/calorifier (2021) * Additional foot pump for seawater wash at galley * Dessalator D60 Water Maker 60L/hr., new high pressure hoses and new membranes (2024) * Water filter (for connecting from dock water tap to boat intake) Tanking * Fuel Tank Capacity 335 liters in two plastic tanks, approx. range 500nm at 5kts * Water tanks capacity 440 liters in two plastic tanks * Holding Tank 90 liters in stainless steel tank
Mast and Rigging * Sloop rig, Selden anadised aluminum boom and mast; mast deck-stepped with stainless steel support column to keel. * In-mast furling, Rodkicker boom vang. All lines controlled at cockpit. * S/S standing rigging professionally inspected in 2024 and certified to be in good condition * Genoa furling Furlex 300S * Running rigging: Good condition with new lines: Genoa halyard, main sail outhaul, boom perventor system, whisker pole rig : new lines (2023/2024)
Deck & Gear * Spinnaker pole Selden extendable, deck-stored * Mast winches 1x Andersen 28, 1 x Andersen 10 * Sheet winches Harken 40ST x 2 (fore sail), Harken 32ST (Mainsheet) * Teak-deck including Teak in sidedeck, foredeck, cockpit and stern steps. Teak completely refurbished (2022) and is in very good condition. * Bowsprit with roller, galvanized Rocnar anchor * Lofran 1KW windlass with foot switches at foredeck and push-switches in cockpit * Stainless steel davit stern mount for dinghy and solar panels * Bracket for outboard engine, custom S.S. bracket for liferaft * RIP Caribe 9L (2022) * Mercury outboard 5 HP 2 stroke (2022)
Sails * Mainsail North Sail, in-mast furling. Very good condition. * Genoa North Sail with Sunbrella protection strip (serviced 2023), good condition. * Storm jib. New, never been used. * Backup jib/staysail, serviceable.
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
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
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
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
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)
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)
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