The Fast 345 T is moderately powered for comfortable coastal cruising, 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 29.5′, the Fast 345 T tops out around 7.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √29.5′ LWL = 7.3 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
138s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
SA / Displacement
17.4
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
38.3%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
200
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
23.5
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.95
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
23.5
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
1.95
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 Fast 345 T sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
J/105
90s/nm
Fast 345 T
138s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
Hunter 34
159s/nm
Tartan 34 2
174s/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° |
2.9 |
3.7 |
4.1 |
4.3 |
| Close Reach60° |
3.5 |
4.5 |
5.0 |
5.2 |
| Beam Reach90° |
4.3 |
5.5 |
6.1 |
6.7 |
| Broad Reach120–135° |
4.0 |
5.1 |
5.7 |
6.1 |
| Run150–180° |
3.2 |
4.1 |
4.5 |
4.7 |
These are simplified estimates based on hull speed (7.3 kts),
SA/D (17.4), 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 Fast 345 T — 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 Fast 345 T.
|
Fast 345 T |
Hunter 34 |
J/105 |
Maxi 100 |
Tanzer 105 |
Tartan 34 2 |
| Dimensions |
| LOA |
34.5 |
34.4 |
34.5 |
34.5 |
34.4 |
34.4 |
| LWL |
29.5 |
28.3 |
30.0 |
25.6 |
27.5 |
28.8 |
| Beam |
11.0 |
11.6 |
11.0 |
10.5 |
11.5 |
11.0 |
| Displacement |
11 |
11 |
7 |
9 |
13 |
11 |
| Ballast |
4 |
5 |
3 |
3 |
5 |
4 |
| Sail Area |
551 |
567 |
600 |
387 |
— |
538 |
| Performance |
| PHRF |
138 |
159 |
90 |
— |
— |
174 |
| SA/Disp |
17.4 |
17.5 |
24.1 |
13.5 |
— |
17.5 |
| Bal/Disp |
38.3 |
42.3 |
44.9 |
— |
43.9 |
40.0 |
| Comfort |
23.5 |
23.1 |
22.3 |
23.7 |
— |
23.0 |
| Capsize |
1.95 |
2.04 |
1.66 |
1.96 |
— |
1.97 |
| Hull Speed |
7.3 |
7.1 |
8.4 |
6.8 |
— |
7.2 |