The Dawn 48 is well-powered with enough sail area to move in light air, with acceptable motion comfort for coastal passages, and respectable in club racing.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 37.7′, the Dawn 48 tops out around 8.2 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √37.7′ LWL = 8.2 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
93s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
SA / Displacement
18.7
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Ballast / Displacement
42.2%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
230
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
29.6
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.93
Below the 2.0 offshore threshold — acceptable for ocean passages.
SA/Disp (Calculated)
14.5
Computed from measured I/J/P/E rather than reported sail area.
Pounds/Inch Immersion
1lbs
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
29.6
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.93
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 Dawn 48 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
X 482
15s/nm
Baltic 48 Dp
48s/nm
Oyster 48 Lightwave
62s/nm
Swan 48 Ss
72s/nm
Dawn 48
93s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
Estimated Speed by Wind
Rough boat speed estimates at different true wind speeds and points of sail — derived from hull speed, SA/D, and displacement, not measured polars.
| Point of Sail |
6 kts TWS |
10 kts TWS |
15 kts TWS |
20 kts TWS |
| Close-hauled40–50° |
3.4 |
4.3 |
4.8 |
5.0 |
| Close Reach60° |
4.1 |
5.2 |
5.9 |
6.1 |
| Beam Reach90° |
5.1 |
6.4 |
7.2 |
7.5 |
| Broad Reach120–135° |
4.7 |
5.9 |
6.6 |
6.9 |
| Run150–180° |
3.8 |
4.8 |
5.3 |
5.5 |
These are simplified estimates based on hull speed (8.2 kts),
SA/D (18.7), and empirical efficiency curves — not instrument-measured
polars. Real-world speed varies with sea state, bottom condition, sail trim, and current.
Speeds in gold approach hull speed;
bold gold means near or at hull speed.
Wind Range & Comfort Envelope
Estimated wind ranges for comfortable sailing on the Dawn 48 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–6 kts
6–20 kts
20–30 kts
30+ kts
Ghosting
0–6 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
6–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–30 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
30+ kts
Storm conditions. Storm jib or bare poles. Seek shelter if coastal.
How It Compares
Side-by-side with the boats most often cross-shopped against the Dawn 48.
|
Dawn 48 |
Baltic 48 Dp |
J/145 |
Oyster 48 Lightwave |
Swan 48 Ss |
X 482 |
| Dimensions |
| LOA |
48.1 |
48.1 |
47.9 |
48.0 |
47.9 |
48.0 |
| LWL |
37.7 |
38.6 |
41.0 |
41.7 |
37.3 |
41.0 |
| Beam |
14.5 |
14.3 |
14.2 |
14.3 |
13.6 |
14.1 |
| Displacement |
27 |
26 |
26 |
27 |
36 |
26 |
| Ballast |
11 |
11 |
11 |
11 |
14 |
11 |
| Sail Area |
1 |
1 |
1,020 |
1 |
1 |
1 |
| Performance |
| PHRF |
93 |
48 |
— |
62 |
72 |
15 |
| SA/Disp |
18.7 |
20.4 |
16.5 |
18.9 |
15.2 |
20.8 |
| Bal/Disp |
42.2 |
44.6 |
42.3 |
— |
39.2 |
— |
| Comfort |
29.6 |
28.7 |
35.9 |
27.6 |
42.5 |
28.0 |
| Capsize |
1.93 |
1.92 |
1.54 |
1.91 |
1.65 |
1.89 |
| Hull Speed |
8.2 |
8.3 |
11.0 |
8.7 |
8.2 |
8.6 |