Detailed sailboat specifications and datasheets since 2015
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Southerly 600

Sailboat specifications

The Southerly 600 is a 58’4” (17.78m) cruising sailboat designed by Dubois Naval Architects (United Kingdom). She was built between 2019 and 2020 by Discovery Yachts Group (United Kingdom).

Southerly 600's main features

Model
Southerly 600
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
2019
Last built hull
2020
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)
N/A

Southerly 600's main dimensions

Overall length
58’ 4”17.78 m
Hull length
58’ 4”17.78 m
Waterline length
57’ 4”17.47 m
Beam (width)
17’ 1”5.2 m
Draft
11’ 4”3.43 m
Draft when appendages up
3’ 6”1.07 m
Mast height from DWL
84’ 1”25.62 m
Light displacement (MLC)
58753 lb26650 kg
Ballast weight
18409 lb8350 kg

Southerly 600's rig and sails

Upwind sail area
2067 ft²192 m²
Mainsail area
947 ft²88 m²
Genoa area
1119 ft²104 m²
Jib area
596 ft²55.36 m²
Rigging type
Sloop Marconi masthead
Mast configuration
Keel stepped mast
Rotating spars
No
Number of levels of spreaders
3
Spreaders angle
Swept-back
Spars construction
Aluminum spars

Southerly 600'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.
232 ft²/T21.52 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.
142
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.
31 %
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.
10.14 knots

Southerly 600's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power
160 HP
Fuel type
Diesel
Fuel tank capacity
367.7 gal1392 liters

Southerly 600's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s)
3
Berth(s) (min./max.)
6 / 8
Head(s)
2
Freshwater tank capacity
274.7 gal1040 liters
Holding tank capacity
126.3 gal478 liters
Fridge/ice-box capacity
87.7 gal332 liters
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