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Southerly 540

Sailboat specifications

The Southerly 540 is a 54’7” (16.63m) cruising sailboat designed by Dubois Naval Architects (United Kingdom). She was built between 2017 and 2020 by Discovery Yachts Group (United Kingdom). She has been awarded "2018 - Cruising World - Boat of the Year: Full-Size Cruiser 54 to 58 Feet".

The Southerly 540 has also been marketed as Southerly 535.

Southerly 540's main features

Model
Southerly 540
Hull type
Monohull
Category
Offshore deck saloon cruising sailboat
Sailboat builder
Sailboat designer
Sailboat range
Country
United Kingdom
Construction
GRP (glass reinforced polyester):
Single skin bottom, sandwich sides and deck: fiberglass vinylester vacuum bagged
First built hull
2017
Last built hull
2020
Award(s)
  • 2018: Cruising World - Boat of the Year: Full-Size Cruiser 54 to 58 Feet
    Appendages
    Lifting keel : swing keel
    Helm
    Twin helm wheels
    Rudder
    Twin spade rudders
    Unsinkable
    No
    Trailerable
    No
    EC design category
     iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)

    A: Wind < force 9, Waves < 10m
    B: Wind < force 8, Waves < 8m
    C: Wind < force 6, Waves < 4m
    D: Wind < force 4, Waves < 0,5m
    A
    Standard public price ex. VAT (indicative only)
    About 
    940 000
     (2019)

    Southerly 540's main dimensions

    Hull length
    54’ 7”16.63 m
    Waterline length
    48’ 11”14.9 m
    Beam (width)
    15’ 8”4.8 m
    Draft
    11’3.34 m
    Draft when appendages up
    3’ 6”1.06 m
    Mast height from DWL
    80’ 2”24.43 m
    Light displacement (MLC)
    51478 lb23350 kg

    Southerly 540's rig and sails

    Upwind sail area
    1938 ft²180 m²
    Mainsail area
    893 ft²83 m²
    Genoa area
    1044 ft²97 m²
    Jib area
    549 ft²51 m²
    Rigging type
    Sloop Marconi 9/10
    Mast configuration
    Keel stepped mast
    Rotating spars
    No
    Number of levels of spreaders
    3
    Spreaders angle
    Swept-back
    Spars construction
    Aluminum spars

    Southerly 540'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.
    237 ft²/T22.03 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.
    200
    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.
    9.37 knots

    Southerly 540's auxiliary engine

    Engine(s)
    1 inboard engine
    Engine(s) power
    146 HP
    Fuel type
    Diesel
    Fuel tank capacity
    237.8 gal900 liters

    Southerly 540's accommodations and layout

    Cockpit
    Center cockpit
    Cabin(s)
    3
    Berth(s)
    6
    Head(s)
    2
    Freshwater tank capacity
    211.3 gal800 liters
    Have you spotted incorrect data?  You can report it in the forum or contact the webmaster

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