The Comet 15 is with a steady, comfortable ride offshore.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
8.6 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 40.7′, the Comet 15 tops out around 8.6 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √40.7′ LWL = 8.5 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
37.0%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
197
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
31.6
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.82
Below the 2.0 offshore threshold — acceptable for ocean passages.
Hull Speed
8.6kts
Pounds/Inch Immersion
12lbs
Weight needed to sink the hull one inch — loading sensitivity.
Motion & Offshore Suitability
Two ratios that matter most when you're planning passages — how the boat feels in a seaway, and whether the hull geometry is suitable for open ocean.
Comfort Ratio
31.6
Good offshore comfort — steady enough for multi-day passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.82
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Comet 15 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
X 482
Baltic 47
Oyster 48 Lightwave
Swan 47 Ss
How It Compares
Side-by-side with the boats most often cross-shopped against the Comet 15.
| Comet 15 | Baltic 47 | Cr 470 | Oyster 48 Lightwave | Swan 47 Ss | X 482 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 47.9 | 47.8 | 47.8 | 48.0 | 47.8 | 48.0 |
| LWL | 40.7 | 39.5 | 41.9 | 41.7 | 36.2 | 41.0 |
| Beam | 14.1 | 14.4 | 14.7 | 14.3 | 13.8 | 14.1 |
| Displacement | 29 | 24 | 29 | 27 | 32 | 26 |
| Ballast | 11 | 10 | 12 | 11 | 15 | 11 |
| Sail Area | — | 1 | 1 | 1 | 1 | 1 |
| Performance | ||||||
| PHRF | — | 24 | — | 62 | 75 | 15 |
| SA/Disp | — | 22.2 | 22.9 | 18.9 | 16.7 | 20.8 |
| Bal/Disp | 37.0 | 41.1 | 42.3 | — | — | — |
| Comfort | 31.6 | 26.0 | 29.4 | 27.6 | 38.4 | 28.0 |
| Capsize | 1.82 | 1.98 | 1.90 | 1.91 | 1.73 | 1.89 |
| Hull Speed | 8.6 | 8.4 | 8.7 | 8.7 | 8.1 | 8.6 |