Review of Compis 345

Compis 345 anno 1987. Den eneste Compis 345 i dansk eje

Basic specs.

The Compis 345 is a sailboat designed by the Swedish maritime architect Bernt Andersson in the late eighties. Only a few boats have been produced.

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Hull

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.

Interior

The boat is equipped with 4 cabins, 8 berths and toilet facility.
The headroom is above average

Rig

The boat equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.

Keel

The Compis 345 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a long keel.

The keel is made of lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.

The boat can only enter major marinas as the draft is about 1.80 - 1.90 meter (5.91 - 6.21 ft) dependent on the load. See immersion rate below.

Engine

Compis 345 is typically equipped with an inboard engine at 18.0 hp (13 kW).

The transmission is a saildrive.

The fuel tank has a capacity of 80 liters (21 US gallons, 17 imperial gallons).

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 Compis 345 is 2.02, 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 Compis 345 is about 232 kg/cm, alternatively 1300 lbs/inch.
Meaning: if you load 232 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1300 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 Compis 345 is 3.18.

Compared with other similar sailboats it is more spacy than 54% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Compis 345 is 35%.

This ballast ratio shows a righting moment that is higher than 24% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly below average.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Compis 345 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	10.5 m	(34.4 feet)	12 mm	(1/2 inch)
Genoa sheet	10.5 m	(34.4 feet)	12 mm	(1/2 inch)
Mainsheet	26.2 m	(86.1 feet)	12 mm	(1/2 inch)
Spinnaker sheet	23.1 m	(75.8 feet)	12 mm	(1/2 inch)

Boat owner's ideas

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

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

Finally

We are always looking for new photos. If you can contribute with photos for Compis 345 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.