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The vessel is a production sailing vessel built by Island Packet of Largo, FL in 1990. She is designed for use in blue water sailing and is rated CE Category A - Ocean. The interior of the vessel consists of a main cabin, v-berth, quarter berth, galley, and head. Her cabin sole is constructed of molded fiberglass. The majority of the interior finishes are bright work and fiberglass, with some epoxied surfaces. There are cushions on all bunks, which are new as of April, 2015. She has overnight accommodations for 6 people and ample storage room. She is constructed with one marine head and a USCG approved MSD type 3 sanitary holding and discharge system. The vessel has a full galley with a stove, sink, and refrigerated ice box. Her water supply is fed from one aluminum water tank totaling 85 gallons. The system is pressurized in the head and galley by a 12-volt pressure actuated pump (1/2 gal per minute). The vessel is also equipped with a hot water heater, which can be heated with an 115v AC element in the tank or via circulating hot water from the engine. The vessel is equipped with all USCG required safety equipment for a vessel of her size (unless otherwise noted below).
The vessel as a whole was constructed using quality workmanship and marine grade materials throughout. The main construction material in her hull, deck, and superstructure is fiberglass reinforced plastic. The deck and superstructure of the vessel are constructed utilizing a core material, which was assembled in typical sandwich construction for composite materials. This was done to minimize the weight of the vessel while maintaining strength. In addition to the sails, the vessel is powered by a 29.6 H.P. Yanmar diesel engine. The new engine has 125 hours recorded on the meter and was installed in October of 2017.
Equipment: Hull Material: Solid GRP Framing Material: Bonded BHD Deck Material: Cored Fiberglass Laminate Deck Frames: Molded Fiberglass Hull to Deck Fastenings: Mechanically and Chemically Bonded Superstructure Material: Cored Fiberglass Laminate Keel Fastenings: Encapsulated Keel Type: Full Ballast Keel Material: Lead Ballast Keel Weight: 5,950 lbs Steering Controls: Edson C-206 Sea Cocks: Bronze Ball Valves (forward thru-hull replaced winter of 2019) Windlass - Maxwell RC (remote control -> new 2020) Anchor #1: Fortress FX 23 (16 lbs) Chain: #1 G4 5/16 26 ft Rhode #1 200 ft 1/2 Anchor #2: Fortress FX 16 (10 lbs) Chain: #2 G4 5/16 20 ft Rhode #2 270 ft 5/8 Dock/Spring Lines: 4 - 1/2 inch Fenders: 4 Arch: Atlantic Towers 8 ft with 4:1 dinghy purchase system Rig Type: Cutter Mast Material: Anodized Aluminum Extrusion Rigging Material: 1X19 Stainless Steel Cable Running Rigging: Yacht Braid Mast Step: Keel Stepped Winches: Primary: (2) Lewmar #40 Self Tailing (new 2019) Halyard/ Service: (2) Lewmar #16 Self Tailing Roller Furling Headstay: Harken
Sails Age Condition Main 9 yrs Very Good Main 0 yrs New 2020 Genoa 1 yrs New 2019 Genoa 9 yrs Excellent Staysail 9 yrs Very Good Propulsion: 29.6 H.P. @ 3,200 RPMs Engine Cooling: Fresh Water Cooled Make: Yanmar Model: 3YM30AE Engine Hours: 125 (new 2017) Reduction Gear: 2.61:1 Engine Controls: Single Lever Push/Pull Cable Propeller Shaft: 1 Stainless Propeller: 15d x 12P RH Fuel Tanks: (1) Under Cabin Sole Fuel Tank Material: Aluminum Fuel Tank Grounded: Yes Fuel Supply Hose: Type A-1 Fuel Vent: Type B-2 Fuel Fill: Weather Deck Fuel Capacity: 28 Gallons Fuel Filter: Raycor 500 Water Separator Fuel Shut-Off: On Tank Top Transmission: KM2P1-262 Electrical System: 12VDC & 110VAC Shore Power System: Single 30 Amp. 110VAC Batteries: (2) Type 31 AGM (new 2020) Battery Cutout Electrical Switch: Vapor Tight 110v AC Battery Charger/Converter: 88 Amp. Engine Alternator: 125 Amp. Wiring: Multi-Strand Plastic Coated Copper Fathometer: Raymarine Compass: Ritchie Powerdamp Knotmeter: Raymarine Radar: Garmin Fantom 18 in. GPS: Garmin 1-742, 1-942xs Wind Instrument: Raymarine VHF Radio: Icom M506 Class D Marine w/AIS Receiver, NMEA 2000 AIS: VesperMarine WatchMate Vision 2000 Solar Panel: 430w Kyocera Fresh Water Tank: 2 Fresh Water Fill: Weather Deck Fresh Water Capacity: 85 Gallons Delivery System: Pressure Hot & Cold Bilge Pumps: 2 (Type: Auto Electric & Manual) Head Toilets: (1) Manual Flush Holding Tank: 9 Gal. MSD Type 3 Refrigeration: Isotherm (Built-In) Galley Stove: Force10 Gimbaled double-burner w/oven (new 2014) Fuel: Propane Dickinson Newport 12,000 BTU Diesel-fired Heater (new 2020) Life Preservers: 2 PFDs (Type II) Man Overboard Device: GPS 742xs/942xs Distress Flairs: Yes (with gun - Expiration Date: October, 2021) Discharge of Oil Placard: Yes MARPOL Trash Placard: Yes Fire Extinguishers: 2 (Type: B ) Carbon Monoxide Detector: Yes Gas Vapor Detector: Yes 2 Dodgers/Bimini/Full Enclosure Fairclough cover (2019 in-water option) Stern Boarding Ladder Teak Cockpit Table Boat was soda-blasted, epoxied, and bottom coated with fresh Hydrocoat in 2020
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)
From BlueWaterBoats.org:
The Island Packet 31, designed by Bob Johnson, founder of Island Packet Yachts, was the most risky and the most successful of the Island Packet lineage. Styled as a traditional cruiser but with more than a hint of broad hulled ‘catboat’ in her appearance, around 262 were produced between 1983 and 1989. She has the simplicity, roomy interior and shallow draft of the catboats, used for transport and fishing around the waters of the New England coast, as well as the wide ‘codhead’ hull.
The Island Packet 31 doesn’t come cheap for a 31 footer. Her huge interior and solid construction are a big part of her allure, notwithstanding the good name that the Island Packet Yachts brand has built. Not everyone is a fan of her unusual design but she’s considered to be a comfortable classic liveaboard yacht, particularly in shoal waters. Opinion is divided on whether she’s truly an offshore cruiser.
In 1979 in Largo, Florida, naval architect Bob Johnson, having designed boats for a number of years for other outfits such as Irwin and Endeavour, decided to set up on his own and began building small boats under the company name Traditional Watercraft Inc. In 1980, modifying old molds from an out-of-business Bombay Yachts, he created the Island Packet 26. The boat was marketed as the Mark I, Mark II and eventually the Island Packet 27 and was quite a success. In 1983 Bob took a leap of faith and put the company on the line essentially, in a time when many yacht builders were struggling to stay in business by designing the Island Packet 31 from scratch. His leap ended gracefully in 14 orders for the IP31 at the U.S. Sailboat show in Annapolis and saw the beginning of a seven year production run which only ended in 1989 with the advent of the Island Packet 32.
The excellent resale value of the Island Packet 31 on the used boat market reflects not only the popularity of the boat but also that of Island Packet Yachts. Over the years Island Packet have earned their place amongst the top producers of cruising yachts, not only for their proven designs but for the apparently outstanding level of customer service and support which they provide. It appears that no man with an Island Packet yacht is an island.
Most Island Packet 31’s come with a double-headed sloop rig but 10% have the plain sloop rig that apparently works well with a 150% genoa. The quirky looks are bestowed by an almost perpendicular stern, short overhangs, sweeping sheer and a stubby bowsprit as well as the broad beam she carries almost throughout, with her maximum 11′ 6″ beam forward of amidships. On deck the flat expanse of cabin roof, full length hand rails and wide side decks make working safe and easy. The cockpit is generously sized at over 7ft but really too big for serious offshore sailing.
Inside, she’s light and airy and has the accommodation of a much bigger boat. There are some clever features such as the folding door/fold down chart table combo which can be used to close off the double quarter berth aft. Plenty of headroom above, a generous sized head, several hanging lockers and a full size wrap around galley fill out the plentiful available space.
Island Packet market traditional designs married with modern construction techniques and although not a heavy boat, time has proven the IP31 solidly built. Island Packet use their own unique product, Polycore, for coring the deck and it appears to have stood the test of time with no reports of delamination. Although liners are used for the interior opinion has it that they are sensibly installed, leaving access to the bilges and other critical areas.
Below the water she carries Bob Johnson’s full foiled keel, a hallmark of Island Packets. It’s essentially a fin keel but stretched lengthways fore and aft into a long keel in a nod to enhancing performance while preserving a shallow draft. As a result draft is only 4′ and around 10% of 31’s were built with centerboards, reducing the draft to 3′ feet. The keel is not fastened to the hull but an integral part of it and according to Bob Johnson is something that’s at the heart of an Island Packet.
Like the catboat, the Island Packet 31 is not renowned for her windward performance. Not unexpected with her unusual volume distribution and large wetted surface area. However, thanks to her short bowsprit she can carry a decent amount of sail and with her long waterline she’s apparently capable of reaching at 6 knots. She’s well balanced with good directional stability but not very responsive. Owner’s report that she’s easy to single hand and is stiff enough to carry maximum sail in up to 20 knots. Light air performance is disappointing. Other owners report an unpleasant slow rolling motion under sail, particularly in chop, thanks to her large roll angles.
Island Packet 31’s are not cheap and their excellent resale value on the used boat market means they usually sell fairly quickly. A current search of the used boat market reveals prices from 45,500 to 67,800 US dollars depending on age and condition. Buyers should note that the Island Packet 31 is challenging to manoeuvre under power, particularly in reverse. A few incidents of blistering have arisen but there are no major problems with this boat.
This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.
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