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Island Packet Estero 36
Designer: Robert K. Johnson  ·  Builder: Island Packet Yachts (Usa)  ·  First built: 2009
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About the Island Packet Estero 36

Robert K. Johnson's design philosophy shines through in this well-proportioned cruising sailboat that exemplifies Island Packet's commitment to comfortable, seaworthy vessels. Built from 2009 onward, the Estero 36 features a traditional long keel configuration that provides excellent directional stability and a forgiving sailing character, making it particularly appealing to cruising couples and small families. The boat's substantial displacement of 19,299 pounds and healthy ballast ratio create a stable, confidence-inspiring platform for coastal and offshore passages. Her masthead sloop rig with 708 square feet of sail area delivers respectable performance while remaining manageable for short-handed crews. The generous beam of 12.34 feet translates to spacious accommodations below, a hallmark of Island Packet designs. With a comfort ratio of 31.89, the Estero 36 prioritizes motion comfort over racing performance, making long passages more pleasant for the crew. The moderate draft of 4 feet opens up many cruising destinations while the long keel provides protection for the propeller and rudder when exploring shallow waters or taking the ground. Island Packet's reputation for quality fiberglass construction and thoughtful details makes this boat a solid choice for serious coastal cruisers and those contemplating their first offshore adventures.

Core Dimensions
LOA (Length Overall) 36.42 ft / 11.10 m
LWL (Waterline Length) 31.43 ft / 9.58 m
Beam 12.34 ft / 3.76 m
Max Draft 4.00 ft / 1.22 m
Displacement 19,299.00 lb / 8,754 kg
Ballast 7,500.00 lb / 3,402 kg
Sail Area (Reported) 708.00 ft² / 65.78 m²
Design & Construction
Hull Type Long Keel
Rigging Type Masthead Sloop
Construction FG
Designer Robert K. Johnson
Builder Island Packet Yachts (USA)
First Built 2009
Associations Official Island Packet Yacht Owners Association
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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 15.8
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
 38.86
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
 277.49
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 31.89
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 1.84
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 7.51 kn
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 1,385.82 pounds/inch
Rig Dimensions
Mast Height (DWL) 54.00 ft / 16.46 m
Engine & Accommodations
Engine Make Yanmar
Engine Type Diesel
Horsepower 40
Fuel Capacity 60 gals / 227 L
Water Capacity 120 gals / 454 L
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