Detailed sailboat specifications and datasheets since 2015
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Maramu

Sailboat specifications

The Maramu is a 45’4” (13.8m) cruising sailboat designed by Henri Amel (France) and Jacques Carteau (France). She was built between 1978 and 1989 by Amel (France) with 288 hulls completed.

Maramu's main features

Model
Maramu
Hull type
Monohull
Category
Offshore cruising sailboat
Sailboat builder
Sailboat designer
Country
France
Construction
Hull and deck: GRP (glass reinforced polyester)
Number of hulls built
288
First built hull
1978
Last built hull
1989
Appendages
Keel : L-shaped keel (with bulb)
Helm
Single helm wheel
Rudder
Single rudder on skeg
Unsinkable
No
Trailerable
No
Former French navigation category
1
Standard public price ex. VAT (indicative only)
N/A

Maramu's main dimensions

Hull length
45’ 4”13.8 m
Waterline length
35’ 10”10.9 m
Beam (width)
13’ 1”4 m
Draft
6’ 2”1.9 m
Mast height from DWL
55’ 10”17 m
Light displacement (MLC)
30865 lb14000 kg
Ballast weight
8818 lb4000 kg

Maramu's rig and sails

Upwind sail area
1055 ft²98 m²
Downwind sail area
1485 ft²138 m²
Mainsail area
291 ft²27 m²
Mizzen sail area
161 ft²15 m²
Genoa area
603 ft²56 m²
Symmetric spinnaker area
1033 ft²96 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
46’ 5”14.14 m
J
 iFore triangle base (from mast foot to bottom of forestay)
15’ 1”4.59 m
P
 iMainsail hoist measurement (from tack to head)
41’ 5”12.62 m
E
 iMainsail foot measurement (from tack to clew)
13’ 6”4.13 m
Rigging type
Ketch Marconi (in-mast furling mainsail) masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
0 °
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire

Maramu's performances

Upwind sail area to displacement
 iThe 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 25 it indicates a fast sailboat.
182 ft²/T16.87 m²/T
Downwind sail area to displacement
 iThe 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.
256 ft²/T23.76 m²/T
Displacement-length ratio (DLR)
 iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The 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 ratio
 iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.

The higher the ballast ratio is, the greater is the stability.
29 %
Critical hull speed
 iAs 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 inboard engine
Engine(s) power
60 HP
Fuel type
Diesel
Fuel tank capacity
126.8 gal480 liters

Maramu's accommodations and layout

Cockpit
Center cockpit
Cabin(s)
2
Berth(s) (min./max.)
6 / 7
Head(s)
2
Freshwater tank capacity
285.3 gal1080 liters
Maximum headroom
6’ 5”1.95 m
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