Review of Grand Banks 58 Classic

Basic specs.

The Grand Banks 58 Classic aka GB 59 CL is a large motorboat designed in the early nineties. The Grand Banks 58 Classic is built by the Malaysian yard Grand Banks.

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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.

Engine

The boat is typically equipped with dual inboard Caterpillar diesel engines at 1080.0 hp (804 kW).

The fuel tank has a capacity of 6145.0 liters (1623 US gallons, 1351 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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Grand Banks 58 Classic is about 637 kg/cm, alternatively 3571 lbs/inch.
Meaning: if you load 637 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 3571 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 Grand Banks 58 Classic is 3.35.

Compared with other similar motor boats it is more spacy than 92% of all other designs. It seems that the designer has chosen a significantly more spacy hull design.

Curiosities

Powerboat?

In Denmark, you are required to have achieved a 'powerboat driving license' in order to sail a powerboat.
In this context a boat is considered a powerboat if:

Danish definition of a powerboat

According to this definition this boat is categorized as a Powerboat.

Maintenance

Boat owner's ideas

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

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

Finally

We are always looking for new photos. If you can contribute with photos for Grand Banks 58 Classic 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.