Detailed sailboat specifications and datasheets since 2015
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Southerly 54

Sailboat specifications

The Southerly 54 is a 54’7” (16.63m) cruising sailboat designed by Dubois Naval Architects (United Kingdom). She is built since 2020 by Discovery Yachts Group (United Kingdom).

The Southerly 54 has also been marketed as Southerly 540.

Southerly 54's main features

Model
Southerly 54
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
2020
Last built hull
Still in production
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
 (2020)

Southerly 54'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 54'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 54'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 54's auxiliary engine

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

Southerly 54's accommodations and layout

Cockpit
Center cockpit
Cabin(s)
3
Berth(s)
6
Head(s)
2
Freshwater tank capacity
211.3 gal800 liters
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