Review of First 25.7 S
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 boat is equipped with 2+2 berths and 40.0 liter fresh water capacity.
The First 25.7 S is 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.
The First 25.7 S has been built with different keel alternatives.
Fin keel
One option is 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 1.45 - 1.55 meter (4.76 - 5.06 ft) dependent on the load. See immersion rate below.
Swing keel
Another option is a swing keel. A swing keel is a pivoting lifting keel, allowing to sail both coastal and inland waters.
First 25.7 S can enter even shallow marinas as the draft is just about 0.85 - 0.95 meter (2.79 - 3.09 ft) dependent on the load. See immersion rate below.
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 First 25.7 S is 2.15, indicating that this boat would not be accepted to participate in ocean races.
First 25.7 S holds three CE certifications:
If less than 4 in on board the boat is by European Union certified as Class B. OFFSHORE:If less than 5 in on board the boat is by European Union certified as Class C. INSHORE:
If less than 6 in on board the boat is by European Union certified as Class D. SHELTERED WATERS:
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for First 25.7 S is about 145 kg/cm, alternatively 815 lbs/inch.
Meaning: if you load 145 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 815 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 First 25.7 S is 2.73.
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 | (24.6 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 7.5 m | (24.6 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 18.8 m | (61.5 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 16.5 m | (54.1 feet) | 10 mm | (3/8 inch) |
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