The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.
The boat is equipped with 965.0 liter fresh water capacity.
Full keel
The Islander 48C is equipped with a long keel. A full keel provide a better directional stability than a similar boat with a fin keel; on the other hand, better directional stability means also that the boat is more difficult to handle in a harbour with less space.
The boat can only enter major marinas as the draft is about 1.80 - 1.90 meter (5.91 - 6.21 ft) dependent on the load. See immersion rate below.
Islander 48C is typically equipped with a Pathfinder diesel engine at 85 hp (63 kW). Calculated max speed is about 7.7 knots.
The fuel tank has a capacity of 378.0 liters (99 US gallons, 83 imperial gallons).
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 Islander 48C is 1.80, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 8.2 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.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Islander 48C is about 318 kg/cm, alternatively 1785 lbs/inch.
Meaning: if you load 318 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 1785 lbs cargo on the boat it will sink 1 inch.
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 Motion Comfort Ratio (MCR)?
The Motion Comfort Ratio for Islander 48C is 33.6.
What is L/B (Length Beam Ratio)?
The l/b ratio for Islander 48C is 3.43.
The ballast ratio for Islander 48C is 37%.
What is Displacement Length Ratio?
The DL-ratio for Islander 48C is 256 which categorizes this boat among 'light crusers & offshore racers'.
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Islander 48C with ISO 8666 reference sail is 17.0, with a 135% genua the SA/D is 20.2.
When buying anti-fouling bottom paint, it's nice to know how much to buy.
The surface of the wet bottom is about 34m2 (365 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.
Dimensions of sail.
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.
Usage | Length | Diameter | ||
Mainsail halyard | 39.6 m | (129.9 feet) | 14 mm | (0.55 inch) |
Jib/genoa halyard | 39.6 m | (129.9 feet) | 14 mm | (0.55 inch) |
Spinnaker halyard | 39.6 m | (129.9 feet) | 14 mm | (0.55 inch) |
Jib sheet | 14.5 m | (47.5 feet) | 16 mm | (5/8 inch) |
Genoa sheet | 14.5 m | (47.5 feet) | 16 mm | (5/8 inch) |
Mainsheet | 36.2 m | (118.8 feet) | 16 mm | (5/8 inch) |
Spinnaker sheet | 31.9 m | (104.5 feet) | 16 mm | (5/8 inch) |
Cunningham | 5.7 m | (18.6 feet) | 14 mm | (0.55 inch) |
Kickingstrap | 11.3 m | (37.1 feet) | 14 mm | (0.55 inch) |
Clew-outhaul | 11.3 m | (37.1 feet) | 14 mm | (0.55 inch) |
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