The Deltania 25 is well-powered with enough sail area to move in light air, with a quick, snappy motion best suited to day sailing.
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.
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
19.9
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Ballast / Displacement
23.7%
Light ballast — tends to be tender; reef earlier than the numbers suggest.
Displacement / Length
175
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
16.6
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.05
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
4lbs
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
16.6
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
2.05
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 Deltania 25 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser 150–210
Heavy Cruiser 210–300
Capri 26 Catalina
213s/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° |
2.7 |
3.4 |
3.8 |
4.0 |
| Close Reach60° |
3.3 |
4.1 |
4.6 |
4.8 |
| Beam Reach90° |
4.0 |
5.1 |
5.7 |
6.2 |
| Broad Reach120–135° |
3.7 |
4.7 |
5.3 |
5.7 |
| Run150–180° |
3.0 |
3.8 |
4.2 |
4.4 |
These are simplified estimates based on hull speed (6.3 kts),
SA/D (19.9), 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 Deltania 25 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–6 kts
6–16 kts
16–24 kts
24+ kts
Ghosting
0–6 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
6–16 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 Deltania 25.
|
Deltania 25 |
Barchetta 27 |
Capri 26 Catalina |
Corby 26 |
Deltania 26 |
Gp 26 Orc |
| Dimensions |
| LOA |
25.9 |
26.0 |
26.0 |
25.9 |
26.0 |
25.9 |
| LWL |
— |
24.7 |
22.5 |
— |
— |
— |
| Beam |
8.3 |
7.9 |
9.1 |
8.2 |
9.4 |
8.5 |
| Displacement |
4 |
2 |
4 |
4 |
4 |
2 |
| Ballast |
992 |
331 |
1 |
1 |
1 |
992 |
| Sail Area |
322 |
322 |
268 |
— |
322 |
349 |
| Performance |
| PHRF |
— |
— |
213 |
— |
— |
— |
| SA/Disp |
19.9 |
31.6 |
16.0 |
12.9 |
18.7 |
33.0 |
| Bal/Disp |
23.7 |
15.8 |
37.5 |
39.8 |
23.8 |
45.0 |
| Comfort |
16.6 |
8.2 |
15.2 |
19.9 |
— |
8.5 |
| Capsize |
2.05 |
2.49 |
2.22 |
1.93 |
2.25 |
2.60 |
| Hull Speed |
6.3 |
6.7 |
6.4 |
6.3 |
— |
6.3 |