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Review of Cross 25


Basic specs.

sail specifications
The Cross 25 is a small sailboat designed by the maritime architect Dieter Blank in the early 2000. The Cross 25 is built by the German yard Cross Yachts.

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Hull

The hull is made of hand laid fibreglass. Generally, a hull made of hand laid 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.


Interior

The interior is like many other boats made of mahogany. Mahogany belongs to the hardwood species, known for being water-repellent and resistant to decay. It has an attractive wood grain and holds wood polish and varnish well.
The boat is equipped with one cabin, 4 berths and a galley.


Rig

The Cross 25 is equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a gennaker or a spinnaker for optimal speed.


Keel

Fin keel

The Cross 25 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 full keel.

The keel is made of lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.

The boat can enter most marinas as the draft is just about 1.59 - 1.69 meter (5.22 - 5.52 ft) dependent on the load. See immersion rate below.


Engine

Cross 25 may be equipped with an inboard Volvo Penta MD2010 diesel engine at 10 hp (7 kW). The speed is 6.0 knots.

The transmission is a saildrive.

The fuel tank, which is made of pvc, has a capacity of 32.0 liters (8 US gallons, 7 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.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Cross 25 is 2.14, indicating that this boat would not be accepted to participate in ocean races.


EU classification

Cross 25 holds a CE certification:

The boat is by European Union certified as Class B. OFFSHORE:
Designed for offshore voyages where conditions up to, and including, wind force 8 (Beaufort scale) and significant wave heights up to, and including, 4 m may be experienced.


Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.3 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.


Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Cross 25 is about 110 kg/cm, alternatively 618 lbs/inch.
Meaning: if you load 110 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 618 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.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Cross 25 is 14.5.

Low High 24% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 24% of all similar sailboat designs. This is a comfort value significantly below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Cross 25 is 3.12.

Wide Slim 69% 0 50 100
Compared with other similar sailboats it is slimmer than 69% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Cross 25 is 38%.

Low High 42% 0 50 100
This ballast ratio shows a righting moment that is higher than 42% of all similar sailboat designs. A righting moment (ability to resist heeling) just below average.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Cross 25 is 151 which categorizes this boat among 'light racers'.

Heavy Light 82% 0 50 100
82% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.


SA/D (Sail Area Displacement ratio)

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

The SA/D for Cross 25 with ISO 8666 reference sail is 21.2, with a 135% genua the SA/D is 24.5.

Low High 92% 0 50 100
The SA/D ratio indicates that it is faster than 92% of all similar sailboat designs in light wind.


Over- / underrigged

Low High 96% 0 50 100
The Cross 25 has more rig than 96% of all similar sailboats, which indicates that the boat is significantly overrigged.


Maintenance

Bottom Paint

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 20m2 (215 ft2).
Based on this, your favourite maritime shop can tell you the quantity you need.

Note: If you use a paint roller you will need more paint than if you use a paintbrush.


Rig

Dimensions of sail for fractional rig.

mainsail specifications headsail specifications spinnaker specifications

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
UsageLengthDiameter
Mainsail halyard 24.4 m(80.1 feet)8 mm(5/16 inch)
Jib/genoa halyard24.4 m(80.1 feet)8 mm(5/16 inch)
Spinnaker halyard24.4 m(80.1 feet)8 mm(5/16 inch)
Jib sheet 7.8 m(25.4 feet)10 mm(3/8 inch)
Genoa sheet7.8 m(25.4 feet)10 mm(3/8 inch)
Mainsheet 19.4 m(63.6 feet)10 mm(3/8 inch)
Spinnaker sheet17.1 m(55.9 feet)10 mm(3/8 inch)
Cunningham3.4 m(11.0 feet)8 mm(5/16 inch)
Kickingstrap6.7 m(22.0 feet)8 mm(5/16 inch)
Clew-outhaul6.7 m(22.0 feet)8 mm(5/16 inch)

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.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.



Finally

We are always looking for new photos. If you can contribute with photos for Cross 25 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