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Review of Mariner 39


Basic specs.

sail specifications
The Mariner 39 is a sailboat designed by the American maritime architect Robert H. Perry in the early eighties. Less than 100 boats have been produced.

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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.

Engine

The boat is typically equipped with an inboard Perkins 4.108 diesel engine at 50.0 hp (37 kW), which gives a max speed about 7.0 knots.

The fuel tank has a capacity of 208.0 liters (54 US gallons, 45 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 Mariner 39 is 1.77, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.


Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 7.8 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 Mariner 39 is about 252 kg/cm, alternatively 1416 lbs/inch.
Meaning: if you load 252 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1416 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 Mariner 39 is 30.7.

Low High 58% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 58% of all similar sailboat designs. This comfort value is just above average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Mariner 39 is 3.28.

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


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Mariner 39 is 212 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 69% 0 50 100
69% 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 Mariner 39 with ISO 8666 reference sail is 16.1, with a 135% genua the SA/D is 19.2.

Low High 38% 0 50 100
The SA/D ratio indicates that it is faster than 38% of all similar sailboat designs in light wind.


Maintenance

Rig

Dimensions of sail.

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 35.6 m(116.8 feet)12 mm(1/2 inch)
Jib/genoa halyard35.6 m(116.8 feet)12 mm(1/2 inch)
Spinnaker halyard35.6 m(116.8 feet)12 mm(1/2 inch)
Jib sheet 11.8 m(38.8 feet)14 mm(0.55 inch)
Genoa sheet11.8 m(38.8 feet)14 mm(0.55 inch)
Mainsheet 29.6 m(97.1 feet)14 mm(0.55 inch)
Spinnaker sheet26.0 m(85.5 feet)14 mm(0.55 inch)
Cunningham4.5 m(14.8 feet)12 mm(1/2 inch)
Kickingstrap9.0 m(29.5 feet)12 mm(1/2 inch)
Clew-outhaul9.0 m(29.5 feet)12 mm(1/2 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 Mariner 39 (Perry) 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