The Gulfstar 43 Ms is modestly canvassed and unhurried, with acceptable motion comfort for coastal passages, designed for cruising comfort rather than 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 39.2′, the Gulfstar 43 Ms tops out around 8.4 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √39.2′ LWL = 8.4 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
153s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
SA / Displacement
13.9
Modestly canvassed — a comfortable, unhurried cruiser.
Displacement / Length
156
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
24.1
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
2.02
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
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
24.1
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
2.02
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 Gulfstar 43 Ms sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Tartan 44
98s/nm
Columbia 43
111s/nm
Nicholson 43
114s/nm
Gulfstar 43
126s/nm
Gulfstar 43 Ms
153s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Irwin 43 1971
177s/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° |
3.0 |
3.9 |
4.3 |
4.5 |
| Close Reach60° |
3.7 |
4.7 |
5.2 |
5.4 |
| Beam Reach90° |
4.5 |
5.7 |
6.4 |
6.9 |
| Broad Reach120–135° |
4.2 |
5.3 |
5.9 |
6.4 |
| Run150–180° |
3.3 |
4.2 |
4.7 |
4.9 |
These are simplified estimates based on hull speed (8.4 kts),
SA/D (13.9), 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 Gulfstar 43 Ms — 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 Gulfstar 43 Ms.
|
Gulfstar 43 Ms |
Columbia 43 |
Gulfstar 43 |
Irwin 43 1971 |
Nicholson 43 |
Tartan 44 |
| Dimensions |
| LOA |
43.3 |
43.3 |
43.3 |
43.5 |
43.3 |
43.1 |
| LWL |
39.2 |
32.0 |
39.2 |
32.0 |
30.0 |
32.7 |
| Beam |
13.9 |
12.3 |
11.9 |
11.5 |
11.5 |
12.3 |
| Displacement |
21 |
18 |
21 |
23 |
19 |
18 |
| Ballast |
— |
9 |
5 |
10 |
9 |
— |
| Sail Area |
660 |
806 |
664 |
872 |
867 |
— |
| Performance |
| PHRF |
153 |
111 |
126 |
177 |
114 |
98 |
| SA/Disp |
13.9 |
18.2 |
14.0 |
17.3 |
19.0 |
— |
| Bal/Disp |
— |
50.3 |
23.8 |
45.7 |
49.9 |
— |
| Comfort |
24.1 |
29.1 |
29.6 |
38.8 |
34.9 |
— |
| Capsize |
2.02 |
1.86 |
1.73 |
1.62 |
1.70 |
— |
| Hull Speed |
8.4 |
7.6 |
8.4 |
7.6 |
7.3 |
— |