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Review of Hanse 312


Basic specs.

sail specifications
The Hanse 312 is a sailboat designed by the German maritime architect bureau judel / vrolijk & co - engineering GmbH in the early 2000. The Hanse 312 is built by the German yard YZG.

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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. 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 boat is equipped with 5 berths and a galley.
The headroom is above average

Rig
The boat 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 genaker or a spinnaker for optimal speed.

Keel

The Hanse 312 is equipped with a centerboard keel. A centerboard keel is a pivoting lifting keel, allowing to sail both coastal and inland waters.

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.

The boat can enter even shallow marinas as the draft is just about 0.95 - 1.05 meter (3.12 - 3.42 ft) dependent on the load. See immersion rate below.


Engine

Hanse 312 is typically equipped with an inboard Yanmar diesel engine.

The transmission is a saildrive.

The fuel tank has a capacity of 50.0 liters (13 US gallons, 10 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 Hanse 312 is 2.05, indicating that this boat would not be accepted to participate in ocean races.


EU classification

Hanse 312 holds one CE certification:

The boat is by European Union certified as Class A. OCEAN:
Designed for extended voyages where conditions may exceed wind force 8 (Beaufort scale) and significant wave heights of 4 m and above but excluding abnormal conditions, and vessels largely self-sufficient.


Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.9 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 Hanse 312 is about 173 kg/cm, alternatively 968 lbs/inch.
Meaning: if you load 173 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 968 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 Hanse 312 is 20.7.

Low High 31% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 31% of all similar sailboat designs. This comfort value is just below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Hanse 312 is 2.95.

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


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Hanse 312 is 206 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 73% 0 50 100
73% 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 Hanse 312 with ISO 8666 reference sail is 18.9, with a 135% genua the SA/D is 22.1.

Low High 82% 0 50 100
The SA/D ratio indicates that it is faster than 82% of all similar sailboat designs in light wind.


Over- / underrigged

Low High 100% 0 50 100
The Hanse 312 has more rig than 100% 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 25m2 (269 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

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 30.6 m(100.2 feet)10 mm(3/8 inch)
Jib/genoa halyard30.6 m(100.2 feet)10 mm(3/8 inch)
Spinnaker halyard30.6 m(100.2 feet)10 mm(3/8 inch)
Jib sheet 9.4 m(31.0 feet)12 mm(1/2 inch)
Genoa sheet9.4 m(31.0 feet)12 mm(1/2 inch)
Mainsheet 23.6 m(77.5 feet)12 mm(1/2 inch)
Spinnaker sheet20.8 m(68.2 feet)12 mm(1/2 inch)
Cunningham4.1 m(13.4 feet)10 mm(3/8 inch)
Kickingstrap8.2 m(26.8 feet)10 mm(3/8 inch)
Clew-outhaul8.2 m(26.8 feet)10 mm(3/8 inch)

Boat owner's ideas

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.



Finally

We are always looking for new photos. If you can contribute with photos for Hanse 312 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