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Coast 34
Designer: Bruce Roberts/Grahame Shannon  ·  Builder: Cape Marine/Windward Marine Ltd. (Can)  ·  First built: 1980
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About the Coast 34

Built by Canadian manufacturers Cape Marine and Windward Marine Ltd. starting in 1980, this 34-footer represents a collaboration between designers Bruce Roberts and Grahame Shannon focused on creating a capable coastal cruiser. The cutter rig configuration provides excellent versatility for varying wind conditions, making it particularly well-suited for extended coastal passages and offshore adventures where sail plan flexibility is paramount. The boat's substantial displacement of 15,750 pounds, combined with a healthy 6,400-pound ballast ratio, delivers the stability and sea-kindly motion that serious cruising sailors appreciate. Its fin keel with rudder on skeg arrangement offers a good balance between performance and directional stability, while the moderate draft of 5.5 feet allows access to a reasonable range of harbors and anchorages. Construction features a fiberglass hull with Airex core, providing strength while keeping weight reasonable for the boat's size. The comfort ratio of 31.06 suggests motion characteristics well-suited to extended passages, while the capsize screening value of 1.84 indicates good offshore capability. With 625 square feet of sail area and a hull speed of 7.17 knots, the Coast 34 delivers respectable performance without sacrificing the seaworthiness that coastal and offshore cruisers demand.

Core Dimensions
LOA (Length Overall) 34.33 ft / 10.46 m
LWL (Waterline Length) 28.67 ft / 8.74 m
Beam 11.48 ft / 3.50 m
Max Draft 5.50 ft / 1.68 m
Displacement 15,750.00 lb / 7,144 kg
Ballast 6,400.00 lb / 2,903 kg
Sail Area (Reported) 625.00 ft² / 58.06 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Cutter
Construction FG w/Airex cored hull
Designer Bruce Roberts/Grahame Shannon
Builder Cape Marine/Windward Marine Ltd. (CAN)
First Built 1980
Related Sailboats ["Sabre 34" · "Pacific Seacraft 34" · "Aloha 104" · "Contest 34" · "Bristol 34"]
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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
 15.97
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
 40.63
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
 298.37
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
 31.06
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. 7.17 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. 1,176.02 pounds/inch
Engine & Accommodations
Engine Make Yanmar
Engine Model 3GM
Engine Type Diesel
Horsepower 27
Fuel Capacity 56 gals / 212 L
Water Capacity 110 gals / 416 L
How It Compares

vs. Aloha 104, Contest 34, Pacific Seacraft 34

This boat Similar boats
Dimensions
LOA
Coast 34 ★
34.3 ft
Aloha 104
34.0 ft
Contest 34
34.0 ft
Pacific Seacraft 34
34.1 ft
LWL
Coast 34 ★
28.7 ft
Aloha 104
28.7 ft
Contest 34
27.6 ft
Pacific Seacraft 34
26.2 ft
Beam
Coast 34 ★
11.5 ft
Aloha 104
11.2 ft
Contest 34
11.2 ft
Pacific Seacraft 34
10.0 ft
Displacement
Coast 34 ★
15 lbs
Aloha 104
13 lbs
Contest 34
16 lbs
Pacific Seacraft 34
13 lbs
Ballast
Coast 34 ★
6 lbs
Aloha 104
4 lbs
Contest 34
7 lbs
Pacific Seacraft 34
4 lbs
Sail Area
Coast 34 ★
625 sq ft
Aloha 104
531 sq ft
Contest 34
484 sq ft
Pacific Seacraft 34
533 sq ft
Performance
PHRF Rating (lower = faster)
Coast 34 ★
—
Aloha 104
—
Contest 34
186 s/nm
Pacific Seacraft 34
192 s/nm
SA / Displacement (higher = more powerful)
Coast 34 ★
16.0
Aloha 104
15.0
Contest 34
12.1
Pacific Seacraft 34
15.1
Ballast / Disp (higher = stiffer)
Coast 34 ★
40.6 %
Aloha 104
34.6 %
Contest 34
—
Pacific Seacraft 34
—
Comfort Ratio (higher = more comfortable offshore)
Coast 34 ★
31.1
Aloha 104
27.9
Contest 34
34.4
Pacific Seacraft 34
34.0
Capsize Screening (lower = safer)
Coast 34 ★
1.84
Aloha 104
1.88
Contest 34
1.76
Pacific Seacraft 34
1.68
Displacement / Length (lower = lighter)
Coast 34 ★
298
Aloha 104
257
Contest 34
—
Pacific Seacraft 34
—
Hull Speed
Coast 34 ★
7.2 kts
Aloha 104
7.2 kts
Contest 34
7.0 kts
Pacific Seacraft 34
6.9 kts
Speed Number (higher = faster)
Coast 34 ★
—
Aloha 104
1.9
Contest 34
1.1
Pacific Seacraft 34
1.4
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