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Javelin 30 Parker
Designer: Fred R. Parker  ·  Builder: Marine Construction Ltd.(Uk)  ·  First built: 1971
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About the Javelin 30 Parker

Designed by Fred R. Parker and built by Marine Construction Ltd. in the UK starting in 1971, this 30-foot sailboat represents solid British craftsmanship from the early days of fiberglass construction. The Javelin 30 features a classic fin keel with rudder on skeg configuration, providing good directional stability while maintaining respectable performance characteristics. With a displacement of 6,720 pounds and ballast of 3,220 pounds, this masthead sloop offers a reassuring feel underfoot for coastal cruising and short offshore passages. The moderate comfort ratio of 22.66 suggests a boat that balances seaworthiness with reasonable motion in a seaway, while the capsize screening formula of 1.91 indicates good stability for her size class. The sail area to displacement ratio of 12.48 points to moderate performance potential, making this an ideal choice for cruising sailors who value steady progress over racing speeds. Her 5-foot draft provides access to many harbors while offering sufficient lateral resistance for windward work. The hull's proportions, with a 22-foot waterline length generating a theoretical hull speed of 6.29 knots, create a well-balanced platform suitable for weekend coastal adventures and extended cruising along protected waters.

Core Dimensions
LOA (Length Overall) 30.50 ft / 9.30 m
LWL (Waterline Length) 22.00 ft / 6.71 m
Beam 9.00 ft / 2.74 m
Max Draft 5.00 ft / 1.52 m
Displacement 6,720.00 lb / 3,048 kg
Ballast 3,220.00 lb / 1,461 kg
Ballast Type Iron
Sail Area (Reported) 277.00 ft² / 25.73 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction FG
Designer Fred R. Parker
Builder Marine Construction Ltd.(UK)
First Built 1971
Associations Half Ton Class
Owner Reviews

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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
12.48
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
47.92
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
281.74
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
22.66
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
1.91
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. 6.29 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. 707.48 pounds/inch
Engine & Accommodations
Engine Make Bukh
Engine Type Diesel
Horsepower 20
Fuel Capacity 10 gals / 38 L
How It Compares

vs. Cc 12 Ton, Chance 30 30 Allied, Columbia 31, Nicholson 31, Tanzer 31

This boat Similar boats
Dimensions
LOA
Javelin 30 Parker ★
30.5 ft
Cc 12 Ton
30.4 ft
Chance 30 30 Allied
30.6 ft
Columbia 31
30.5 ft
Nicholson 31
30.5 ft
Tanzer 31
30.6 ft
LWL
Javelin 30 Parker ★
22.0 ft
Cc 12 Ton
24.3 ft
Chance 30 30 Allied
25.0 ft
Columbia 31
21.5 ft
Nicholson 31
24.2 ft
Tanzer 31
25.0 ft
Beam
Javelin 30 Parker ★
9.0 ft
Cc 12 Ton
10.8 ft
Chance 30 30 Allied
10.0 ft
Columbia 31
9.8 ft
Nicholson 31
10.2 ft
Tanzer 31
10.5 ft
Displacement
Javelin 30 Parker ★
6 lbs
Cc 12 Ton
6 lbs
Chance 30 30 Allied
11 lbs
Columbia 31
8 lbs
Nicholson 31
13 lbs
Tanzer 31
8 lbs
Ballast
Javelin 30 Parker ★
3 lbs
Cc 12 Ton
Chance 30 30 Allied
6 lbs
Columbia 31
3 lbs
Nicholson 31
4 lbs
Tanzer 31
3 lbs
Sail Area
Javelin 30 Parker ★
277 sq ft
Cc 12 Ton
388 sq ft
Chance 30 30 Allied
483 sq ft
Columbia 31
Nicholson 31
484 sq ft
Tanzer 31
468 sq ft
Performance
PHRF Rating (lower = faster)
Javelin 30 Parker ★
Cc 12 Ton
Chance 30 30 Allied
Columbia 31
222 s/nm
Nicholson 31
194 s/nm
Tanzer 31
165 s/nm
SA / Displacement (higher = more powerful)
Javelin 30 Parker ★
12.5
Cc 12 Ton
18.1
Chance 30 30 Allied
15.5
Columbia 31
Nicholson 31
14.1
Tanzer 31
18.3
Ballast / Disp (higher = stiffer)
Javelin 30 Parker ★
47.9 %
Cc 12 Ton
Chance 30 30 Allied
Columbia 31
40.0 %
Nicholson 31
Tanzer 31
39.8 %
Comfort Ratio (higher = more comfortable offshore)
Javelin 30 Parker ★
22.7
Cc 12 Ton
15.9
Chance 30 30 Allied
30.2
Columbia 31
Nicholson 31
35.0
Tanzer 31
21.0
Capsize Screening (lower = safer)
Javelin 30 Parker ★
1.91
Cc 12 Ton
2.33
Chance 30 30 Allied
1.79
Columbia 31
Nicholson 31
1.74
Tanzer 31
2.08
Displacement / Length (lower = lighter)
Javelin 30 Parker ★
281
Cc 12 Ton
198
Chance 30 30 Allied
Columbia 31
381
Nicholson 31
Tanzer 31
237
Hull Speed
Javelin 30 Parker ★
6.3 kts
Cc 12 Ton
6.6 kts
Chance 30 30 Allied
6.7 kts
Columbia 31
Nicholson 31
6.6 kts
Tanzer 31
6.7 kts
Speed Number (higher = faster)
Javelin 30 Parker ★
Cc 12 Ton
2.9
Chance 30 30 Allied
1.5
Columbia 31
Nicholson 31
0.9
Tanzer 31
2.4
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