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Sadly, were selling our 1994 Shannon39 that has been loved and meticulously maintained. This 42.5-foot Shannon is a safe, stable cruiser and a dream to sail in any weather conditions. The Solent sail rig provides for excellent sail trim in any conditions. Shes fully equipped for offshore voyaging yet her 5.5-foot draft allows for gunkholing around the hidden shallows of the Chesapeake or the Bahamas. Shannons are world-renowned blue water sailing yachts that have logged millions of ocean miles, including an impressive list of circumnavigations and transoceanic passages. Every major harbor in the world has been visited by a Shannon and since 1975 Shannons boatbuilding experience is an unbroken, evolutionary chain under the personal direction of Founder and President, Walter Schulz. Rannoch is a Shannon39 that was built by the Shannon Boat Company in Rhode Island in 1994. The list of upgraded equipment is extensive. She has 4 new sails, an upgraded touch screen Garmin 5212 with integrated (NEMA) Ray Marine ST6000 auto pilot, wind, and depth instruments. With a newer Magnum Inverter and a 250-Watt solar panel, charging the new battery bank from the slip or offshore is easy.
Equipment: Galley: Tasco three-burner gimbaled stove with fiddles, oven, safety bar and strap Cockpit solenoid control, fume detector and propane shut off Double deep stainless-steel sinks Sea Frost 12v refrigeration with front and top opening access Freezer compartment Pressure water, hot and cold Fresh water foot pump PLUMBING: 96 Gallons in two 48 gal tanks Pressure water pump Plumbed for water maker (not installed) Hot water heater Standard marine toilet Separate shower in head Hot/cold freshwater shower in cockpit Y Valve at the head for overboard flush offshore Holding tank 20 gallons with level gauge and dockside pumpout NAVIGATION & COMMNICATION SYSTEMS Garmin Radar and Plotter New Garmin display for chart plotter at the helm (touch screen) AIS integrated with Garmin VHF radio, Horizon Intrepid with RAM mic Single sideband antenna with insulated backstay Newer Garmin wind instruments Datamarine depth and speed Raymarine ST600 autopilot with wireless remote Binnacle compass Masthead Windex MECHANICAL & ELECTRICAL SYSTEMS: Mechanical: Yanmar 4JH2E with under approximately 3500 hours is supper clean Serial no #07961 Diesel 50 gallon tank in port cockpit locker Full engine instrumentation in the cockpit Diesel is professionally maintained each season Racor fuel filters with pressure gauge Engine mounts replaced in 2004 New rudder shaft seal and packing 2006 Traditional shaft seal repacked in 2006 in good condition New three blade feathering Max prop 2016 Spare fixed three blade prop Wheel steering Electrical: 12 Volt system: Four group 31 gel cell batteries in boxes (New in 2023) Charged by 80 amp main alternator or shore power 12 volt electrical breaker panel Electric bilge pumps Cabin lights Stereo with inside and outside speakers OGM navigation lights at deck level Tri-color masthead light Steaming light Foredeck lights 110 volt Shore power: 30 amp shore power connection Shore power cord 50 Battery charger Inverter Ducting for air conditioning is installed (no compressor) 250 Watt framed solar panel SAILS & RIGGING Shannon thoughtful Solent rig with a masthead blade jib as well as a masthead genoa gives you all the options for wind strength and direction. THE RIG: Keel stepped mast with double spreaders Shannon Solent (scutter) rigged headsails with Harken furlering for genoa and jib headsails Rod rigging in good condition. New chain plates in 2018. Genoa furler has two slots Aluminum spares Mainsheet traveler on stainless steel mount Jib car tracks with Schaefer blocks Whisker pole Line stoppers LEWMAR WINCHES: main mast has Lewmar #24 ST winches for halyards Lewmar #44 mainsheet winch on the cabin house Lewmar #54 CST primaries for genoa sheets on the combing Lewmar #40 CST secondaries port and starboard for jib or genny Lewmar #44 on the sb quarter spinnaker winch SAIL INVENTORY: Total working sail area 750 sq ft New North sails (Main and Genoa) in circa 2021 with very light use Mainsail, North Sail fully battened offshore mainsail with lazy jacks system New (2021), 130% Northsail offshore genoa with Harken furler Newer (2018) 80% Yankee Jib with Harken furler (lightly used). New (2022-never used) custom A3 offshore medium weight asymmetri
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)
Redesign of SHANNON 38.
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