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Seller's Description

Having owned ESCONDIDA for 14 years we’ve had plenty of time to lavish her with upgrades. ESCONDIDA has been setup for long term cruising, weekends, or seasonal use. Between the wind generator and solar the engine seldom needs to be run to keep the batteries charged, the water tank full and the beer cold. In her current state ESCONDIDA is fully prepared to continue cruising the US East coast, Bahamas or Caribbean with minimal fuss. The deck and hull were just painted in 2021, the bottom paint was new in 2021. This is a vessel that would cost someone thousands of extra dollars to replicate with a less well equipped hull. Sailing the ketch rig upwind allows for many options depending on wind and sea state, downwind with the spinnaker ESCONDIDA keeps pace with much larger vessels.

*Amateur HF (HAM) radio, and clock/barometer set not included in sale. **preliminary listing/photos, once boat is de-cluttered from cruising more interior photos will be added

Equipment: Propulsion

Phasor P3-28-05 Kubota D1105 Twin-Disc MG360 gear 2:1 JBC Hydralign 3 blade feathering propeller Single lever Vetus control Hours : 2373 as of 1-May-22 Racor 500 fuel filter PYI PSS dripless shaft seal

Sails-Masts-Rigging Main sail, Banks sails, 2011 good condition Mizzen sail, Precision sails, 2021 like new Head sail, Precision sails, 2018 very good Asymmetrical spinnaker, C&C sails, with sock, 2018 very good All standing rigging new 2018 with 2010 hi-mod fittings Chain plates all new 2010 Mizzen stay tangs and Main lower tangs new 2018 Compression post new 2010 Running rigging various ages, but all good to very good Bobstay tang replaced 2018

Electrical Balmar 70 amp alternator with Balmar MC-614 regulator 450 AH of Interstate GC2 batteries, new 2019 with watering system, keeping battery water topped up is a breeze 15 amp battery charger/maintainer 200 watt Air Breeze wind generator on mizzen mount 200 watts Sunpower panels with Victron 75-15 MPPT regulator on dodger Two Sunguard solar controllers for roving panels 200 watts Sunpower flex panels normally laid on the fordeck 100 watts Sunpower flex panels normally laid on the bimini using tether points attached to canvas group 24 Interstate start battery charged via ACR from house battery 30 amp 120VAC shore power inlet 2 outlets in cabin 600 watt pure sine inverter

Galley Force 10 3 burner stove with oven Isotherm refrigeration galley sink with foot pumps for both fresh and seawater and pressurized water ample storage for pots and pans as well as cruising stores

Head Raritan PHII head Raritan Electro-Scan (2021) with new Raritan saniflex hose

Plumbing Pex potable water plumbing 2010 all through hull fittings/valves replaced within 5 years with Groco bronze fittings and flanged adapters cockpit shower deck/anchor wash down (seawater) pump Schenker 35L/hr water maker refurbished 2021 automatic bilge pump manual bilge pump

Ground Tackle Mantus 45lb anchor 225’ ACCO 5/16 G4 chain re-galvanized 2018 200’ 5/8 8-plait rhode Danforth backup/kedge anchor with appropriate rhode Maxwell electric windlass

Electronics Raymarine Axiom 9 chart plotter Raymarine Quantum radar Em-Trak SOTDMA calls B AIS transponder Standard Horizon GX2150 VHF/AIS receiver with independent GPS Standard Horizon RAM mic at helm ONWA KP-38 chart plotter at nav desk with global K-Charts Fusion MS-205 stereo with Bluetooth dongle 2 polyplanar speakers in salon Si-Tex SSB receiver Humminbird/Geonav Autopilot with Raymarine type 1 rotary drive Signet Depth sounder Signet Knot meter Garmin inreach communicator Tiller pilot for use with wind vane

Helm Edson Rack and Pinion steering CapHorn wind vane Ritchie compass emergency tiller

Deck Hardware Lewmar EVO 45 chrome self tailing winches (primaries) dodger with acrylic windows (new 2019) bimini (new 2019) cockpit shades (new 2019) sail covers (new 2019) 4 Newfound metals opening ports in salon 4 Simpson Lawrence opening ports 1 Lewmar opening port 2 Simpson Lawrence dead lights 2 Bomar hatches All hardware re-bed 2021 Bowsprit wood new 2017 Stainless handrails tie-down pad eyes for dinghy stowage

Cabin V-Berth mattress custom built, new 2018 Salon Cushions new 2010, kept covered while in use. Lee cloths for both port and starboard settees Starboard settee converts into double bed All lights LED Webasto FCF5000 air


Thomas Gillmer
Allied Boat Company Inc.
Allied Seawind II Home Page
# Built
FG w/balsa deck & coach


Length Overall
31 11 / 9.8 m
Waterline Length
25 5 / 7.8 m
10 5 / 3.2 m
4 5 / 1.4 m
14,900 lb / 6,759 kg
5,800 lb / 2,631 kg (Lead)

Rig and Sails

Reported Sail Area
513′² / 47.7 m²
Total Sail Area
514′² / 47.8 m²
Sail Area
223′² / 20.7 m²
33 8 / 10.3 m
13 3 / 4 m
Air Draft
Sail Area
291′² / 27 m²
38 9 / 11.8 m
14 11 / 4.6 m
Forestay Length
41 7 / 12.7 m

Auxilary Power

Fuel Type
Fuel Capacity
Engine Hours


Water Capacity
Holding Tank Capacity


Hull Speed
6.5 kn
Classic: 6.77 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

6.46 knots
Classic formula: 6.77 knots
Sail Area/Displacement
<16: under powered

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
<40: less stiff, less powerful

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
>350: ultraheavy

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
30-40: moderate bluewater cruising 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 ocean passages

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


See SEAWIND MKII KETCH (ALLIED) for more details.
Also called SEAWIND 32.
Updated vers. of SEAWIND 30. The Seawind II came to the market in 1975 as the successor to the original SEAWIND. Production of the SEABREEZE , LUDERS 33, and CHANCE 30-30 was stopped to fill orders for this new model. But the price was much higher and customers continued to order the old version instead. For a while both models were being built at the same time while sales of the new version remained weak, the economy slowed and the company approached melt down.
Available as staysail ketch, cutter, or sloop (rare). Rack & pinion (on deck) wheel steering was standard.

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