The Day Sailer Ii is with a quick, snappy motion best suited to day sailing.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
5.3 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 15.5′, the Day Sailer Ii tops out around 5.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √15.5′ LWL = 5.3 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Displacement / Length
69
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
4.9
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
3.01
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Hull Speed
5.3kts
S# (Speed Number)
7.6
Pounds/Inch Immersion
2lbs
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
4.9
Quick, snappy motion — better for day sails and racing than long passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
3.01
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Day Sailer Ii sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Thistle
How It Compares
Side-by-side with the boats most often cross-shopped against the Day Sailer Ii.
| Day Sailer Ii | Cape Cod Cat | Daysailer | Holder 17 | Thistle | Wildfire | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 16.8 | 17.0 | 16.8 | 17.0 | 17.0 | 16.8 |
| LWL | 15.5 | 16.4 | 15.5 | 15.0 | 17.0 | 15.0 |
| Beam | 6.3 | 7.9 | 6.3 | 7.3 | 6.0 | 6.3 |
| Displacement | 575 | 2 | 575 | 950 | 515 | 620 |
| Ballast | — | 500 | — | 345 | — | 250 |
| Sail Area | — | 250 | 145 | 147 | — | — |
| Performance | ||||||
| PHRF | — | — | — | — | 186 | — |
| SA/Disp | — | 23.7 | 33.6 | 24.4 | — | — |
| Bal/Disp | — | 22.7 | — | 36.3 | — | 40.3 |
| Comfort | 4.9 | 13.0 | 4.9 | 6.7 | — | — |
| Capsize | 3.01 | 2.44 | 3.01 | 2.95 | — | — |
| Hull Speed | 5.3 | 5.4 | 5.3 | 5.2 | — | — |