The Wasa Atlantic 51 is moderately powered for comfortable coastal cruising, with a steady, comfortable ride offshore.
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 42.4′, the Wasa Atlantic 51 tops out around 8.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √42.4′ LWL = 8.7 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
17.9
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
37.1%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
132
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
32.5
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.54
Below the 2.0 offshore threshold — acceptable for ocean passages.
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
32.5
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
1.54
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 Wasa Atlantic 51 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Baltic 51
45s/nm
Skye 51
59s/nm
Centurion 49
69s/nm
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° |
3.6 |
4.5 |
5.0 |
5.2 |
| Close Reach60° |
4.3 |
5.4 |
6.1 |
6.3 |
| Beam Reach90° |
5.3 |
6.7 |
7.5 |
8.1 |
| Broad Reach120–135° |
4.9 |
6.2 |
6.9 |
7.5 |
| Run150–180° |
3.9 |
4.9 |
5.5 |
5.8 |
These are simplified estimates based on hull speed (8.7 kts),
SA/D (17.9), 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 Wasa Atlantic 51 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–20 kts
20–28 kts
28+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–28 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
28+ 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 Wasa Atlantic 51.
|
Wasa Atlantic 51 |
Baltic 51 |
Centurion 49 |
Skye 51 |
Sun Odyssey 51 Jeanneau |
X 512 |
| Dimensions |
| LOA |
50.7 |
50.9 |
50.6 |
50.8 |
50.8 |
51.1 |
| LWL |
42.4 |
40.9 |
40.3 |
42.9 |
42.3 |
41.5 |
| Beam |
10.8 |
15.3 |
14.7 |
14.3 |
16.0 |
14.8 |
| Displacement |
22 |
34 |
30 |
38 |
30 |
30 |
| Ballast |
8 |
13 |
12 |
15 |
9 |
13 |
| Sail Area |
887 |
1,228 |
1 |
1 |
1 |
1 |
| Performance |
| PHRF |
— |
45 |
69 |
59 |
— |
— |
| SA/Disp |
17.9 |
18.7 |
18.3 |
17.7 |
21.9 |
22.7 |
| Bal/Disp |
37.1 |
39.4 |
41.4 |
— |
32.2 |
— |
| Comfort |
32.5 |
32.1 |
30.8 |
38.4 |
26.5 |
28.9 |
| Capsize |
1.54 |
1.88 |
1.87 |
1.69 |
2.04 |
1.91 |
| Hull Speed |
8.7 |
8.6 |
8.5 |
8.8 |
8.7 |
8.6 |