The Mariner Centaur is modestly canvassed and unhurried, with a gentle bluewater motion.
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 29.0′, the Mariner Centaur tops out around 7.2 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √29.0′ LWL = 7.2 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
12.7
Modestly canvassed — a comfortable, unhurried cruiser.
Comfort Ratio
44.6
Very comfortable in a seaway — a genuine bluewater motion.
Capsize Screening
1.57
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
44.6
Very comfortable in a seaway — a genuine bluewater motion.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.57
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 Mariner Centaur sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Contest 34
186s/nm
Pacific Seacraft 34
192s/nm
Hans Christian 34
201s/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° |
2.5 |
3.2 |
3.6 |
3.7 |
| Close Reach60° |
3.0 |
3.8 |
4.3 |
4.5 |
| Beam Reach90° |
3.7 |
4.7 |
5.3 |
5.5 |
| Broad Reach120–135° |
3.5 |
4.4 |
4.9 |
5.1 |
| Run150–180° |
2.8 |
3.5 |
3.9 |
4.1 |
These are simplified estimates based on hull speed (7.2 kts),
SA/D (12.7), 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 Mariner Centaur — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–8 kts
8–22 kts
22–30 kts
30+ kts
Ghosting
0–8 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
8–22 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
22–30 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 Mariner Centaur.
|
Mariner Centaur |
Contest 34 |
Formosa 34 |
Hans Christian 34 |
Pacific Seacraft 34 |
Rival 34 |
| Dimensions |
| LOA |
34.0 |
34.0 |
34.0 |
34.0 |
34.1 |
34.0 |
| LWL |
29.0 |
27.6 |
29.5 |
29.2 |
26.2 |
24.8 |
| Beam |
10.8 |
11.2 |
11.8 |
11.0 |
10.0 |
9.7 |
| Displacement |
21 |
16 |
13 |
19 |
13 |
11 |
| Ballast |
5 |
7 |
4 |
7 |
4 |
4 |
| Sail Area |
600 |
484 |
— |
676 |
533 |
— |
| Performance |
| PHRF |
— |
186 |
— |
201 |
192 |
— |
| SA/Disp |
12.7 |
12.1 |
— |
15.0 |
15.1 |
— |
| Bal/Disp |
— |
43.2 |
30.9 |
37.1 |
— |
39.5 |
| Comfort |
44.6 |
34.4 |
25.4 |
40.2 |
34.0 |
— |
| Capsize |
1.57 |
1.76 |
1.99 |
1.64 |
1.68 |
— |
| Hull Speed |
7.2 |
7.0 |
7.3 |
7.2 |
6.9 |
— |