Review of Altura 42

Basic specs.

sail specifications
The Altura 42 is a large motorsailer designed by the maritime architect Alberto Mercati in the late seventies.

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The boat can enter most marinas as the draft is just about 1.70 - 1.80 meter (5.58 - 5.88 ft) dependent on the load. See immersion rate below.


The boat is typically equipped with a Fiat diesel engine at 135.0 hp (100 kW).

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 Altura 42 is 1.65, indicating that this boat could - if evaluated by this formula alone - 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 Altura 42 is about 318 kg/cm, alternatively 1782 lbs/inch.
Meaning: if you load 318 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1782 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 Altura 42 is 3.29.

Slim Wide 54% 0 50 100
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.



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
Jib sheet 12.5 m(41.0 feet)14 mm(0.55 inch)
Genoa sheet 12.5 m(41.0 feet)14 mm(0.55 inch)
Mainsheet 31.2 m(102.5 feet)14 mm(0.55 inch)
Spinnaker sheet27.5 m(90.2 feet)14 mm(0.55 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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If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.