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420
Designer: Christian Maury  ·  Builder: Various  ·  First built: 1959
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About the 420

Recognized worldwide as one of the most successful youth sailing dinghies ever created, this French-designed two-person boat has shaped generations of competitive sailors since its introduction in the 1960s. Originally conceived by Christian Maury, the design quickly gained international acclaim and became the foundation for Olympic-level sailing programs across the globe. Built for high-performance sailing instruction and junior racing, this centerboard dinghy excels in protected waters where aspiring sailors can develop advanced boat handling skills. The boat's responsive nature and forgiving characteristics make it ideal for teaching everything from basic seamanship to sophisticated racing tactics. Its planing hull design rewards proper technique while remaining manageable for developing sailors. The asymmetrical spinnaker configuration provides excellent downwind performance and teaches crew coordination essential for larger keelboats. Notable for its durability and consistent performance across varying conditions, the design has maintained its relevance in sailing programs worldwide. Many Olympic medalists and professional sailors credit their early experience in this class as fundamental to their sailing careers. Perfect for sailing schools, yacht clubs, and competitive junior programs, this boat represents the gold standard in performance sailing education.

Core Dimensions
LOA (Length Overall) 13.78 ft / 4.20 m
LWL (Waterline Length) 13.17 ft / 4.01 m
Beam 5.42 ft / 1.65 m
Max Draft 3.17 ft / 0.97 m
Displacement 220.00 lb / 100 kg
Design & Construction
Hull Type Centerboard Dinghy
Rigging Type Fractional Sloop
Construction FG
Designer Christian Maury
Builder Various
First Built 1959
Number Built 56000
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Performance Ratios
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
42.99
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. 1.53 pounds/inch
Rig Dimensions
I (Foretriangle Height) 0.50 ft / 0.15 m
P (Mainsail Luff) 140.00 ft² / 13.01 m²
E (Mainsail Foot) 42.99
How It Compares

vs. Flying Tern, Force 5, Ilca 6 Laser Radial, Ilca 7 Laser International, Javelin 14 Fox

This boat Similar boats
Dimensions
LOA
420 ★
13.8 ft
Flying Tern
13.9 ft
Force 5
13.9 ft
Ilca 6 Laser Radial
13.9 ft
Ilca 7 Laser International
13.9 ft
Javelin 14 Fox
14.0 ft
LWL
420 ★
13.2 ft
Flying Tern
Force 5
13.2 ft
Ilca 6 Laser Radial
12.5 ft
Ilca 7 Laser International
12.5 ft
Javelin 14 Fox
13.2 ft
Beam
420 ★
5.4 ft
Flying Tern
5.1 ft
Force 5
4.8 ft
Ilca 6 Laser Radial
4.5 ft
Ilca 7 Laser International
4.5 ft
Javelin 14 Fox
5.7 ft
Displacement
420 ★
220 lbs
Flying Tern
287 lbs
Force 5
140 lbs
Ilca 6 Laser Radial
128 lbs
Ilca 7 Laser International
128 lbs
Javelin 14 Fox
475 lbs
Sail Area
420 ★
Flying Tern
120 sq ft
Force 5
91 sq ft
Ilca 6 Laser Radial
62 sq ft
Ilca 7 Laser International
76 sq ft
Javelin 14 Fox
125 sq ft
Performance
SA / Displacement (higher = more powerful)
420 ★
Flying Tern
44.2
Force 5
54.0
Ilca 6 Laser Radial
39.1
Ilca 7 Laser International
47.9
Javelin 14 Fox
32.9
Comfort Ratio (higher = more comfortable offshore)
420 ★
Flying Tern
Force 5
2.0
Ilca 6 Laser Radial
2.1
Ilca 7 Laser International
2.1
Javelin 14 Fox
5.4
Capsize Screening (lower = safer)
420 ★
Flying Tern
3.09
Force 5
3.72
Ilca 6 Laser Radial
3.56
Ilca 7 Laser International
3.56
Javelin 14 Fox
2.91
Displacement / Length (lower = lighter)
420 ★
42
Flying Tern
Force 5
27
Ilca 6 Laser Radial
Ilca 7 Laser International
29
Javelin 14 Fox
92
Hull Speed
420 ★
Flying Tern
Force 5
4.9 kts
Ilca 6 Laser Radial
4.7 kts
Ilca 7 Laser International
4.7 kts
Javelin 14 Fox
4.9 kts
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