gib sea 76 sailboatdata

Review of Gib'Sea 76

Basic specs..

The Gib'Sea 76 has been built with more than one type of keel. One option is 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 keel is made of iron. Many people prefer lead keel in favour of iron. The main argument is that lead is much heavier than iron and a lead keel can therefore be made smaller which again result in less wet surface, i.e. less drag. In fact iron is quite heavy, just 30% less heavy than lead, so the advantage of a lead keel is often overstated. As the surface of a fin type keel is just a fraction of the total wet surface, the difference between an iron keel and a lead keel can in reality be ignored for cruising yachts.

The boat can enter most marinas as the draft is just about 1.55 - 1.65 meter (5.09 - 5.39 ft) dependent on the load. See immersion rate below.

Gib'Sea 76 is typically equipped with an inboard Volvo Penta 2001 diesel engine at 9.0 hp (6 kW), which gives a max speed about 4.6 knots.

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.

The fuel tank has a capacity of 20 liters (5 US gallons, 4 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.

What is Capsize Screening Formula (CSF)?

The capsize screening value for Gib'Sea 76 is 2.18, indicating that this boat would not be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.2 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.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Gib'Sea 76 is about 126 kg/cm, alternatively 705 lbs/inch. Meaning: if you load 126 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 705 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.

What is Motion Comfort Ratio (MCR)?

What is L/B (Length Beam Ratio)?

What is a Ballast Ratio?

What is Displacement Length Ratio?

SA/D (Sail Area Displacement ratio) Indicates how fast the boat is in light wind: - Cruising Boats have ratios 10-15 - Cruiser-Racers have ratios 16-20 - Racers have ratios above 20 - High-Performance Racers have ratios above 24 Sail-area/displacement ratio (SA/D ratio): 15.75

What is Relative Speed Performance?

Maintenance

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 22m 2 (236 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.

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.

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.

We are always looking for new photos. If you can contribute with photos for Gib'Sea 76 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.

1986 Gib'Sea 76 Technical Specs

General data about gib'sea 76, engine and power specs, dimensions and wieght, detailed specifications, features and equipments, safety features, other equipments, interior specifications, electronical and electrical info, deck hardware.

More 76 models

• Gib'Sea provided us with the latest version of its 76 service repair manual
• Find All mechanical and electrical parts and accessories of Gib'Sea 76 Power here

Gib'Sea 76 competitors

I have been a recreational sailor for many years, with a particular interest in small sailing craft; therefore much of the content of my 'blog' will be related to this subject.

Monday, February 23, 2015

Gib’sea 76.

2 comments:

Looks like one of the many good little bilge keelers that are so suited to shoal water sailing. I really like the idea of being able to haul out without having to rely on a cradle - the boat just sits upright and you can scrub and paint without banging the old head!

Bill careful what you say about the better and prettier 77 -personal opinion of course. Having raced both boats the Gibsea 77 fin is quicker in the right hands. The gibsea 77 has won the family trophy in the round the island race. 3rd in class and 13th overall. The 76 is different with those windows that let great light in but also its achilles heel . very expensive to replace as a custom 3d mould and also make the boat look smaller than it actually is. loads of room inside both, tardis like, bigger toilet in 76 both will fit larger people. The 76 has removed the front cabin and fitted an aft one at the cost of beam and not such a good seating/sleeping area.( no sea bunk) dont get me wrong they are both great boats and easy to sail. bigger boats are back breaking and have heavy sails. However its about sailing the 77 wins as it has a bigger cockpit better for sleeping crew, hence I moved to the 77 as it suited racing. Race laminates look great on the boat and bought them from Arun Rockall. Perhaps we should get gibsea's to meet at this years round the island race especially 76's and 77's, 262s, 28s,282, 242s 21s, 7.7s etc. enter cruiser B.

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• Sailboat Guide

Gib'sea 28

Gib'sea 28 is a 27 ′ 10 ″ / 8.5 m monohull sailboat designed by Joubert-Nivelt and built by Gib'sea/Gibert Marine between 1978 and 1984.

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

• SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
• D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

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Wholesale Marine Distributors of Quality Marine Products 

for Over 25 Years

The Gib Sea 44 is a 43.18ft masthead sloop designed by Joubert - Nivelt and built in fiberglass by Gib'sea/Gibert Marine (FRA) since 1977.

The Gib Sea 44 is a moderate weight sailboat which is a reasonably good performer. It is reasonably stable / stiff and has a good righting capability if capsized. It is best suited as a coastal cruiser.

Gib Sea 44 for sale elsewhere on the web:

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