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Sailboat specifications and datasheets

Southerly 535

The Southerly 535 is a 54’7” monohull sailboat designed by Edward Dubois. She was built by Northshore (United Kingdom) and made of monolithic bottom, sandwich sides and deck: fiberglass / vinylester vaccum bagged. This sailboat was produced between 2014 and 2017.

The Southerly 535 belongs to the Southerly range. The Southerly 535 has also been marketed as Southerly 540.

Northshore  Southerly 535 Northshore  Southerly 535 layoutNorthshore  Southerly 535 layoutNorthshore  Southerly 535 sailingNorthshore  Southerly 535 sailingNorthshore  Southerly 535 sailingNorthshore  Southerly 535 sailingNorthshore  Southerly 535 sailingNorthshore  Southerly 535 sailingNorthshore  Southerly 535 accommodationsNorthshore  Southerly 535 accommodationsNorthshore  Southerly 535 accommodationsNorthshore  Southerly 535 accommodations
Southerly 535's   Main Features
Model Southerly 535
Type of hull Monohull
Category Offshore deck saloon cruising sailboat
Shipyard
Designer Edward Dubois
Range Southerly
Construction Hull and deck:
monolithic bottom, sandwich sides and deck: fiberglass / vinylester vaccum bagged
First built hull 2014
Last built hull 2017
Appendages Keel (lifting) :
Swing keel
Helm 2 wheels
Rudder 2 spade rudders
Cockpit Central cockpit
Unsinkable No
Trailerable No
EC certification A
Standard public price ex. VAT (indicative only) About
940 000
(2017)
Southerly 535's   Main dimensions
Hull length 54’ 7”
Waterline length 48’ 11”
Beam (width) 15’ 8”
Draft 11’
Draft when appendages up 3’ 6”
Mast height from DWL 80’ 2”
Light displacement 51478 lbs
Southerly 535's   Rig and sails
Upwind sail area 1938 sq.ft
Mainsail area 893 sq.ft
Genoa area 1044 sq.ft
Jib area 549 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Keel stepped mast
Spars Mast and boom in Aluminum
Number of levels of spreaders 3
Spreaders angle Swept-back
Southerly 535'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.
22.03
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.
200
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.
9.37 knots
Southerly 535's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 146 HP
Fuel type Diesel
Fuel tank capacity 237.8 gal
Southerly 535's   Accommodation
Cabin(s) 3
Berth(s) 6
Head(s) 2
Fresh water tank capacity 211.3 gal

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