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Hydra 16
Designer: Mike West  ·  Builder: J&S Marine (Au)/Allan Bell (Uk)/Panthercraft  ·  First built: 1971
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About the Hydra 16

Designed by Mike West in 1971, this compact catamaran represents an early foray into affordable multihull sailing that proved remarkably successful with 1200 units built across multiple continents. The international production run spanning builders in Australia (J&S Marine), the UK (Allan Bell), and Panthercraft demonstrates the design's broad appeal and solid reputation. At just over 16 feet with twin centerboards, the Hydra 16 offers the classic catamaran advantages of shallow draft access and impressive stability from its 7.5-foot beam. The fractional sloop rig features a rotating mast, a sophisticated touch that enhances aerodynamic efficiency and sailing performance well beyond what the modest dimensions might suggest. With a sail area to displacement ratio of 61.74, this lightweight 280-pound cat delivers spirited acceleration and responsive handling. The fiberglass construction ensures durability while keeping maintenance reasonable, making it an attractive option for weekend sailors and sailing schools alike. Best suited for protected waters, lakes, and gentle coastal sailing, the Hydra 16 excels as a daysailer that can introduce newcomers to multihull sailing or provide experienced sailors with an exciting small-boat experience. Its shallow 2.58-foot draft opens up cruising grounds typically off-limits to deeper monohulls.

Core Dimensions
LOA (Length Overall) 16.50 ft / 5.03 m
LWL (Waterline Length) 16.00 ft / 4.88 m
Beam 7.50 ft / 2.29 m
Max Draft 2.58 ft / 0.79 m
Min Draft 0.50 ft / 0.15 m
Displacement 280.00 lb / 127 kg
Sail Area (Reported) 165.00 ft² / 15.33 m²
Design & Construction
Hull Type Catamaran Twin Cbrd.
Rigging Type Frac. Sloop (Rotating Spar)
Construction FG
Designer Mike West
Builder J&S Marine (AU)/Allan Bell (UK)/Panthercraft
First Built 1971
Number Built 1200
Related Sailboats ["Hobie 16" · "Nacra 500" · "G Cat 50" · "Tornado Texas" · "505"]
Owner Reviews

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Performance Ratios
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
1.82
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
4.59
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. 5.36 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. 2.57 pounds/inch
Engine & Accommodations
KSP 1.54
How It Compares

vs. G Cat 50, Nacra 500, Tornado Texas

This boat Similar boats
Dimensions
LOA
Hydra 16 ★
16.5 ft
G Cat 50
16.7 ft
Nacra 500
16.4 ft
Tornado Texas
16.4 ft
LWL
Hydra 16 ★
16.0 ft
G Cat 50
15.5 ft
Nacra 500
Tornado Texas
15.6 ft
Beam
Hydra 16 ★
7.5 ft
G Cat 50
8.0 ft
Nacra 500
8.2 ft
Tornado Texas
5.6 ft
Displacement
Hydra 16 ★
280 lbs
G Cat 50
340 lbs
Nacra 500
297 lbs
Tornado Texas
425 lbs
Sail Area
Hydra 16 ★
165 sq ft
G Cat 50
210 sq ft
Nacra 500
190 sq ft
Tornado Texas
160 sq ft
Performance
SA / Displacement (higher = more powerful)
Hydra 16 ★
G Cat 50
Nacra 500
68.4
Tornado Texas
45.3
Comfort Ratio (higher = more comfortable offshore)
Hydra 16 ★
1.8
G Cat 50
2.1
Nacra 500
Tornado Texas
4.2
Capsize Screening (lower = safer)
Hydra 16 ★
4.59
G Cat 50
4.59
Nacra 500
Tornado Texas
2.97
Hull Speed
Hydra 16 ★
5.4 kts
G Cat 50
5.3 kts
Nacra 500
Tornado Texas
5.3 kts
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