Detailed sailboat specifications and datasheets since 2015
MetricSI (m)
Imperial & Metricboth
ImperialIMP (ft)

Southerly 42 RST

Sailboat specifications

The Southerly 42 RST is a 42’2” (12.86m) cruising sailboat designed by Humphreys Yacht Design (United Kingdom). She was built between 2007 and 2017 by Northshore (United Kingdom).

The Southerly 42 RST has also been marketed as Southerly 430.

Southerly 42 RST's main features

Model
Southerly 42 RST
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
2007
Last built hull
2017
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 
440 000
 (2017)

Southerly 42 RST's main dimensions

Hull length
42’ 2”12.86 m
Waterline length
36’ 6”11.11 m
Beam (width)
13’ 2”4.03 m
Draft
8’ 11”2.72 m
Draft when appendages up
2’ 10”0.84 m
Mast height from DWL
61’ 6”18.73 m
Light displacement (MLC)
25003 lb11341 kg
Ballast weight
8091 lb3670 kg

Southerly 42 RST's rig and sails

Upwind sail area
792 ft²73.62 m²
Mainsail area
468 ft²43.44 m²
Jib area
325 ft²30.18 m²
Rigging type
Sloop Marconi fractional
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
Swept-back
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire

Southerly 42 RST'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.
157 ft²/T14.58 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.
234
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.
32 %
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.
8.09 knots

Southerly 42 RST's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power
57 HP
Fuel type
Diesel
Fuel tank capacity
79.3 gal300 liters

Southerly 42 RST's accommodations and layout

Cockpit
Open aft cockpit
Cabin(s) (min./max.)
2 / 3
Berth(s) (min./max.)
4 / 8
Head(s)
2
Freshwater tank capacity
71.3 gal270 liters
Have you spotted incorrect data?  You can report it in the forum or contact the webmaster

Similar sailboats that may interest you:


Sailboats
First built hull
Hull length
Hallberg-Rassy 412 (Hallberg-Rassy)
2012
41’ 5”12.61 m
Super Maramu (Amel)
1988
52’ 6”16 m
Hallberg-Rassy 40 MkII (Hallberg-Rassy)
2015
40’ 8”12.4 m
Super Maramu 2000 (Amel)
2000
52’ 6”16 m
Amel 50 (Amel)
2017
50’ 11”15.51 m
Southerly 435 (Discovery Yachts Group)
2017
42’ 2”12.86 m
Southerly 430 (Discovery Yachts Group)
2019
42’ 2”12.86 m
Southerly 420 (Northshore)
2010
42’ 2”12.86 m
Southerly 470 (Discovery Yachts Group)
2017
47’ 4”14.43 m
Southerly 47 (Northshore)
2012
47’ 4”14.43 m
Southerly 440 (Discovery Yachts Group)
2019
42’ 4”12.9 m
Southerly 480 (Discovery Yachts Group)
2019
48’ 8”14.83 m
Southerly 42 (Discovery Yachts Group)
2020
42’ 2”12.86 m
Southerly 48 (Discovery Yachts Group)
2020
48’ 8”14.83 m
Southerly 35 RS (Northshore)
2007
35’ 6”10.82 m
Boat-Specs.com uses cookies to improve user experience. By using our website you consent to all cookies in accordance with our Cookie Policy.

Read more