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Sailboat specifications and datasheets

Maramu

The Maramu is a 45’4” offshore monohull sailboat designed by Henri Amel and Jacques Carteau. She was built by Amel (France) and made of GRP (glass reinforced polyester). This sailboat was produced between 1978 and 1989 with 288 hulls completed.
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Maramu's   Main Features
Model Maramu
Type of hull Monohull
Category Offshore cruising sailboat
Shipyard
Designer Henri Amel
Jacques Carteau
Construction GRP (glass reinforced polyester)
First built hull 1978
Last built hull 1989
Number of hulls built 288
Appendages Keel :
L-shaped keel (with bulb)
Helm 1 wheel
Rudder 1 rudder on skeg
Cockpit Central cockpit
Unsinkable No
Trailerable No
French navigation category 1
Standard public price ex. VAT (indicative only) N/A
Maramu's   Main dimensions
Hull length 45’ 4”
Waterline length 35’ 10”
Beam (width) 13’ 1”
Draft 6’ 2”
Mast height from DWL 55’ 10”
Light displacement 30865 lbs
Ballast weight 8818 lbs
Maramu's   Rig and sails
Upwind sail area 1055 sq.ft
Downwind sail area 1485 sq.ft
Mainsail area 291 sq.ft
Mizzen sail area 161 sq.ft
Genoa area 603 sq.ft
Symetric spinnaker area 1033 sq.ft
Rigging type Ketch Marconi (in-mast furling mainsail) masthead
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire
Number of levels of spreaders 2
Spreaders angle 0 °
IiFore triangle height (from mast foot to fore stay attachment) 46’ 5”
JiFore triangle base (from mast foot to bottom of forestay) 15’ 1”
PiMainsail hoist measurement (from tack to head) 41’ 5”
EiMainsail foot measurement (from tack to clew) 13’ 6”
Maramu's   Performances
Upwind sail area to displacementiThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.
The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. Upwind : under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 23 it indicates a fast sailboat.
16.87
Downwind sail area to displacementiThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.
The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. Upwind : under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 23 it indicates a fast sailboat.
23.76
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length: a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.
306
Ballast ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
29 %
Hull speediAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".
The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.
8.01 knots
Maramu's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 60 HP
Fuel type Diesel
Fuel tank capacity 126.8 gal
Maramu's   Accommodation
Cabin(s) 2
Berth(s) (min/max) 6 / 7
Head(s) 2
Fresh water tank capacity 285.3 gal
Maximum headroom 6’ 5”

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