Review of Gib'Sea 126

Basic specs.

The Gib'Sea 126 is a large sailboat designed by the French maritime architect Michel Joubert in the early eighties. The Gib'Sea 126 is built by the French yard Gibert Marine.

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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 boat is equipped with 6- berths.

Rig

The boat equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.

Keel

The Gib'Sea 126 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a long keel.

The boat can only enter major marinas as the draft is about 1.87 - 1.97 meter (6.14 - 6.44 ft) dependent on the load. See immersion rate below.

Engine

Gib'Sea 126 is typically equipped with an inboard diesel engine at 37.0 kW (49 hp).

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

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 Gib'Sea 126 is 1.96, 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 Gib'Sea 126 is about 341 kg/cm, alternatively 1914 lbs/inch.
Meaning: if you load 341 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1914 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 Gib'Sea 126 is 3.11.

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.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Gib'Sea 126 is 34%.

This ballast ratio shows a righting moment that is higher than 21% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly below average.

SA/D (Sail Area Displacement ratio)

What is SA/D (Sail Area Displacement ratio)?

The SA/D for Gib'Sea 126 with ISO 8666 reference sail is 15.5, with a 135% genua the SA/D is 18.5.

The SA/D ratio indicates that it is faster than 21% of all similar sailboat designs in light wind.

Over- / underrigged

The Gib'Sea 126 has more rig than 54% of all similar sailboats, which indicates that the boat is slightly overrigged.

Maintenance

Rig

Dimensions of sail for masthead rig.

Are your sails worn out? You might find your next sail here: Sails for Sale

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**
Usage	Length		Diameter
Mainsail halyard	35.1 m	(115.1 feet)	12 mm	(1/2 inch)
Jib/genoa halyard	35.1 m	(115.1 feet)	12 mm	(1/2 inch)
Spinnaker halyard	35.1 m	(115.1 feet)	12 mm	(1/2 inch)
Jib sheet	12.6 m	(41.3 feet)	14 mm	(0.55 inch)
Genoa sheet	12.6 m	(41.3 feet)	14 mm	(0.55 inch)
Mainsheet	31.5 m	(103.3 feet)	14 mm	(0.55 inch)
Spinnaker sheet	27.7 m	(90.9 feet)	14 mm	(0.55 inch)
Cunningham	4.3 m	(14.1 feet)	12 mm	(1/2 inch)
Kickingstrap	8.6 m	(28.2 feet)	12 mm	(1/2 inch)
Clew-outhaul	8.6 m	(28.2 feet)	12 mm	(1/2 inch)

Boat owner's ideas

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

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Finally

We are always looking for new photos. If you can contribute with photos for Gib'Sea 126 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.