The Ross 930 is aggressively canvassed for its weight, with a quick, snappy motion best suited to day sailing, 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 26.6′, the Ross 930 tops out around 6.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √26.6′ LWL = 6.9 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
109s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
SA / Displacement
23.6
Performance-oriented — carries a lot of canvas for its weight.
Ballast / Displacement
36.1%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
115
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
13.9
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.19
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
879lbs
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
13.9
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
2.19
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 Ross 930 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Ross 930
109s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
Tanzer 31
165s/nm
Nicholson 31
194s/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° |
3.3 |
4.1 |
4.6 |
4.8 |
| Close Reach60° |
3.9 |
5.0 |
5.6 |
5.8 |
| Beam Reach90° |
4.8 |
6.1 |
6.8 |
7.4 |
| Broad Reach120–135° |
4.5 |
5.6 |
6.3 |
6.8 |
| Run150–180° |
3.6 |
4.5 |
5.0 |
5.3 |
These are simplified estimates based on hull speed (6.9 kts),
SA/D (23.6), 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 Ross 930 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–5 kts
5–16 kts
16–24 kts
24+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–16 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
16–24 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
24+ 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 Ross 930.
|
Ross 930 |
First 30 E Beneteau Berret |
First 305 Beneteau |
Nicholson 31 |
Sabre 30 3 |
Tanzer 31 |
| Dimensions |
| LOA |
30.5 |
30.5 |
30.5 |
30.5 |
30.6 |
30.6 |
| LWL |
26.6 |
27.0 |
26.8 |
24.2 |
25.5 |
25.0 |
| Beam |
9.3 |
10.7 |
10.5 |
10.2 |
10.5 |
10.5 |
| Displacement |
4 |
7 |
8 |
13 |
9 |
8 |
| Ballast |
1 |
2 |
2 |
4 |
3 |
3 |
| Sail Area |
420 |
392 |
410 |
484 |
461 |
468 |
| Performance |
| PHRF |
109 |
— |
— |
194 |
— |
165 |
| SA/Disp |
23.6 |
17.1 |
16.1 |
14.1 |
16.6 |
18.3 |
| Bal/Disp |
36.1 |
40.6 |
36.1 |
— |
— |
39.8 |
| Comfort |
13.9 |
16.6 |
19.9 |
35.0 |
23.5 |
21.0 |
| Capsize |
2.19 |
2.23 |
2.08 |
1.74 |
1.99 |
2.08 |
| Hull Speed |
6.9 |
7.0 |
6.9 |
6.6 |
6.8 |
6.7 |