Review of Grand Banks 42 Motoryacht

Basic specs.

The Grand Banks 42 Motoryacht also known as GB 42 MY or GB 42 MY is a large motorboat designed in the late eighties. The Grand Banks 42 Motoryacht is built by the Singaporean yard American Marine Singapore.

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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 interior is like most other boats made of teak. Teak has the advantage of being naturally very oily and therefore water-repellent, which is suitable on boats.
The boat is equipped with 2 cabins, a galley, 1022.0 liter fresh water capacity, toilet facility and 151.0 liter waste water capacity.

Engine

The Grand Banks 42 Motoryacht has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with dual inboard Ford Lehman diesel engines at 135 hp (100 kW). Cruise speed is 7.0 knots. Max speed is 10.0 knots.

Alternative 2:

Grand Banks 42 Motoryacht may be equipped with dual inboard Caterpillar 3208 TA diesel engines at 750 hp (558 kW). Cruise speed is 10.0 knots. Max speed is 19.0 knots.

The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.

Alternative 3:

The boat may be equipped with an inboard Caterpillar diesel engine at 210 hp (156 kW).

The fuel tank has a capacity of 1136.0 liters (300 US gallons, 249 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 42 Motoryacht is about 353 kg/cm, alternatively 1978 lbs/inch.
Meaning: if you load 353 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1978 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 42 Motoryacht is 3.08.

Compared with other similar motor boats it is more spacy than 66% of all other designs. It seems that the designer has chosen a slightly 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 not categorized as a Powerboat.
Though, if you install a motor of 165 kW (221 hp), then the boat will become a powerboat, and you will need a Danish 'powerboat driving license'

Maintenance

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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Finally

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References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.