Review of Offshore 1/4 ton
Basic specs.
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The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.
The interior is like few other boats made in fibreglass.
Fin keel
The Offshore 1/4 ton is equipped with a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel.
The boat can enter even shallow marinas as the draft is just about 1.37 - 1.47 meter (4.49 - 4.79 ft) dependent on the load. See immersion rate below.
The boat is typically equipped with various Petter diesel engines at 5 hp (3 kW)..
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 Offshore 1/4 ton is 2.27, indicating that this boat would not be accepted to participate in ocean races.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Offshore 1/4 ton is about 125 kg/cm, alternatively 700 lbs/inch.
Meaning: if you load 125 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 700 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 L/B (Length Beam Ratio)?
The l/b ratio for Offshore 1/4 ton is 2.99.
The ballast ratio for Offshore 1/4 ton is 42%.
Maintenance
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.
| Usage | Length | Diameter | ||
|---|---|---|---|---|
| Jib sheet | 7.5 m | (24.5 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 7.5 m | (24.5 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 18.7 m | (61.3 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 16.4 m | (53.9 feet) | 10 mm | (3/8 inch) |
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