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Surprise 45
Designer: Pieter Beeldsnijder  ·  Builder: Ta Yang Yacht Building Co. (Taiwan)  ·  First built: 1981
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About the Surprise 45

Designed by renowned Dutch naval architect Pieter Beeldsnijder, this Taiwan-built ketch represents the golden era of offshore cruising sailboats from the early 1980s. Built by Ta Yang Yacht Building Co., the Surprise 45 combines European design sensibilities with proven Taiwanese fiberglass construction techniques that made these boats legendary for their durability and seaworthiness. With her substantial 26,400-pound displacement and generous 11,023-pound ballast, this masthead ketch is purpose-built for serious offshore cruising. The 6.42-foot draft and fin keel configuration provide excellent stability and windward performance, while the comfortable 33.21 comfort ratio indicates a boat that handles ocean swells with aplomb. Her capsize screening formula of 1.81 falls well within the accepted range for offshore sailing, giving confidence for blue-water passages. The ketch rig offers versatility in heavy weather conditions, allowing for balanced sail combinations when winds pipe up. At 45.93 feet overall with a 35.58-foot waterline, she strikes an ideal balance between interior volume and sailing performance. Her hull speed of nearly 8 knots means respectable passage times, while the moderate sail area to displacement ratio suggests comfortable, controlled sailing rather than racing performance. This is a yacht designed for couples or small crews seeking reliable, long-distance cruising capability.

Core Dimensions
LOA (Length Overall) 45.93 ft / 14.00 m
LWL (Waterline Length) 35.58 ft / 10.84 m
Beam 13.42 ft / 4.09 m
Max Draft 6.42 ft / 1.96 m
Displacement 26,400.00 lb / 11,975 kg
Ballast 11,023.00 lb / 5,000 kg
Sail Area (Reported) 919.00 ft² / 85.38 m²
Headroom 6.33 ft / 1.93 m
Design & Construction
Hull Type Fin Keel
Rigging Type Masthead Ketch
Construction FRP
Designer Pieter Beeldsnijder
Builder Ta Yang Yacht Building Co. (TAIWAN)
First Built 1981
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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
16.65
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
41.75
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
261.66
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
33.21
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
1.81
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. 7.99 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. 1,706.10 pounds/inch
Rig Dimensions
Mast Height (DWL) 57.33 ft / 17.47 m
Engine & Accommodations
Engine Make Perkins
Engine Model 4.108
Engine Type Diesel
Horsepower 51
Fuel Capacity 85 gals / 322 L
Water Capacity 170 gals / 644 L
LOD 43.00 ft / 13.11 m
How It Compares

vs. Delta 46, Liberty 458, Oceanic 46 Brewer

This boat Similar boats
Dimensions
LOA
Surprise 45 ★
45.9 ft
Delta 46
45.8 ft
Liberty 458
45.8 ft
Oceanic 46 Brewer
45.8 ft
LWL
Surprise 45 ★
35.6 ft
Delta 46
40.3 ft
Liberty 458
40.3 ft
Oceanic 46 Brewer
36.5 ft
Beam
Surprise 45 ★
13.4 ft
Delta 46
12.8 ft
Liberty 458
12.9 ft
Oceanic 46 Brewer
13.5 ft
Displacement
Surprise 45 ★
26 lbs
Delta 46
30 lbs
Liberty 458
31 lbs
Oceanic 46 Brewer
33 lbs
Ballast
Surprise 45 ★
11 lbs
Delta 46
11 lbs
Liberty 458
11 lbs
Oceanic 46 Brewer
11 lbs
Sail Area
Surprise 45 ★
919 sq ft
Delta 46
Liberty 458
925 sq ft
Oceanic 46 Brewer
Performance
SA / Displacement (higher = more powerful)
Surprise 45 ★
16.7
Delta 46
Liberty 458
15.1
Oceanic 46 Brewer
Ballast / Disp (higher = stiffer)
Surprise 45 ★
41.8 %
Delta 46
36.7 %
Liberty 458
Oceanic 46 Brewer
34.3 %
Comfort Ratio (higher = more comfortable offshore)
Surprise 45 ★
33.2
Delta 46
Liberty 458
37.8
Oceanic 46 Brewer
Capsize Screening (lower = safer)
Surprise 45 ★
1.81
Delta 46
Liberty 458
1.65
Oceanic 46 Brewer
Displacement / Length (lower = lighter)
Surprise 45 ★
261
Delta 46
204
Liberty 458
Oceanic 46 Brewer
307
Hull Speed
Surprise 45 ★
8.0 kts
Delta 46
Liberty 458
8.5 kts
Oceanic 46 Brewer
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