Review of Contessa 25

Basic specs.

The Contessa 25 is a small sailboat designed by the American maritime architect Douglas Blair Peterson in the mid seventies. The Contessa 25 is built by the British yard Jeremy Rogers.

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Interior

The boat is equipped with 5 berths and a galley.

Keel

Keel of Contessa 25 anno 1975.

Unknown keel type

The boat can enter most marinas as the draft is just about 1.57 - 1.67 meter (5.15 - 5.45 ft) dependent on the load. See immersion rate below.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Contessa 25 is 2.28, indicating that this boat would not be accepted to participate in ocean races.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Contessa 25 is about 149 kg/cm, alternatively 834 lbs/inch.
Meaning: if you load 149 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 834 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Contessa 25 is 2.64.

Compared with other similar sailboats it is more spacy than 88% of all other designs. It seems that the designer has chosen a significantly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Contessa 25 is 42%.

This ballast ratio shows a righting moment that is higher than 62% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Contessa 25 is 66

The relative speed performance is 66 which means that a it is faster than 66% of all similar sailboat designs.

Maintenance

Rig

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

**Guiding dimensions of running rig**
Usage	Length		Diameter
Jib sheet	7.7 m	(25.2 feet)	10 mm	(3/8 inch)
Genoa sheet	7.7 m	(25.2 feet)	10 mm	(3/8 inch)
Mainsheet	19.2 m	(62.9 feet)	10 mm	(3/8 inch)
Spinnaker sheet	16.9 m	(55.4 feet)	10 mm	(3/8 inch)

Boat owner's ideas

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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Finally

We are always looking for new photos. If you can contribute with photos for Contessa 25 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.

References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.