Review of Atlantis 420

Basic specs.

sail specifications
The Atlantis 420 is a large sailboat.

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The boat can only enter major marinas as the draft is about 2.93 - 3.03 meter (9.61 - 9.91 ft) dependent on the load. See immersion rate below.


The boat is typically equipped with an engine.

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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Atlantis 420 is about 373 kg/cm, alternatively 2094 lbs/inch.
Meaning: if you load 373 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2094 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 Atlantis 420 is 3.16.

Slim Wide 73% 0 50 100
Compared with other similar sailboats it is more spacy than 73% 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 13.3 m(43.6 feet)16 mm(5/8 inch)
Genoa sheet 13.3 m(43.6 feet)16 mm(5/8 inch)
Mainsheet 33.2 m(109.0 feet)16 mm(5/8 inch)
Spinnaker sheet29.2 m(95.9 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.

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


We are always looking for new photos. If you can contribute with photos for Atlantis 420 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.