Review of A78

Basic specs.

sail specifications
The A78 is a large sailboat.

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The hull is a double hull which improves the indoor climate. Especially when the water is colder than the air in the cabin, then the double hull insulates against cold water and reduce the condense water in the cabin.


The boat is equipped with 1300.0 liter fresh water capacity.

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 A78 is 1.81, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 11.3 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for A78 is about 844 kg/cm, alternatively 4731 lbs/inch.
Meaning: if you load 844 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 4731 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 A78 is 4.09.

Sorry, we do not have sufficient statistical information available for this boat to provide a significant reliable analysis.



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 24.0 m(78.7 feet)16 mm(5/8 inch)
Genoa sheet 24.0 m(78.7 feet)16 mm(5/8 inch)
Mainsheet 60.0 m(196.7 feet)16 mm(5/8 inch)
Spinnaker sheet52.8 m(173.1 feet)16 mm(5/8 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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If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.