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Seaward 46Rk
Designer: Nick Hake  ·  Builder: Seaward Yachts (Usa)  ·  First built: 2012
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About the Seaward 46Rk

Nick Hake's design philosophy shines through in this distinctive lifting keel cruiser from Seaward Yachts. Built from 2012 onward, the 46RK represents an innovative approach to bluewater sailing with its unique lifting keel configuration and dual rudder setup, offering the rare combination of shallow water accessibility and deep water performance. The lifting keel system allows adventurous cruisers to explore skinny waters and remote anchorages typically off-limits to traditional deep-draft vessels, while maintaining the stability and seaworthiness expected from a 23,000-pound displacement cruiser. With 7,500 pounds of ballast and a comfort ratio of 24.86, this boat prioritizes motion comfort over pure speed, making it ideal for extended offshore passages and coastal exploration. The masthead sloop rig with 1,006 square feet of sail area provides balanced performance across varying wind conditions, while the dual rudder configuration enhances control and reduces weather helm. At nearly 49 feet overall with a 13.25-foot beam, the 46RK offers spacious accommodations without sacrificing seaworthiness. The low capsize screening value of 1.87 confirms its offshore credentials, making it a compelling choice for serious cruising couples seeking global adventure with the flexibility to venture into challenging waters.

Core Dimensions
LOA (Length Overall) 48.00 ft / 14.63 m
LWL (Waterline Length) 44.83 ft / 13.66 m
Beam 13.25 ft / 4.04 m
Max Draft 7.00 ft / 2.13 m
Min Draft 2.42 ft / 0.74 m
Displacement 23,000.00 lb / 10,433 kg
Ballast 7,500.00 lb / 3,402 kg
Sail Area (Reported) 1,006.00 ft² / 93.46 m²
Design & Construction
Hull Type Lifting keel with dual rudders
Rigging Type Masthead Sloop
Construction FG
Designer Nick Hake
Builder Seaward Yachts (USA)
First Built 2012
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
 19.98
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
 32.61
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
 113.97
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
 24.86
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
 1.87
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. 8.97 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. 2,122.42 pounds/inch
Rig Dimensions
Mast Height (DWL) 62.00 ft / 18.90 m
Engine & Accommodations
Engine Make Yanmar
Engine Type Dieselx2
Fuel Capacity 180 gals / 681 L
Water Capacity 180 gals / 681 L
LOD 45.33 ft / 13.82 m
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