Southerly 480
Sailboat specifications
The Southerly 480 is a 48’8” (14.83m) cruising sailboat designed by Stephen Jones Yacht Design (United Kingdom). She was built between 2019 and 2020 by Discovery Yachts Group (United Kingdom).
Southerly 480's main features
- Model
- Southerly 480
- 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 categoryiThe 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 480's main dimensions
- Overall length
- 48’ 8”14.83 m
- Hull length
- 48’ 8”14.83 m
- Waterline length
- 42’ 10”13.05 m
- Beam (width)
- 14’ 7”4.46 m
- Draft
- 10’ 2”3.12 m
- Draft when appendages up
- 3’ 4”1 m
- Mast height from DWL
- 71’ 7”21.83 m
- Light displacement (MLC)
- 38043 lb17256 kg
- Ballast weight
- 13492 lb6120 kg
Southerly 480's rig and sails
- Upwind sail area
- 1399 ft²130 m²
- Mainsail area
- 619 ft²57.5 m²
- Genoa area
- 780 ft²72.5 m²
- Jib area
- 491 ft²45.6 m²
- Rigging type
- Sloop Marconi (in-mast furling mainsail) 9/10
- Mast configuration
- Keel stepped mast
- Rotating spars
- No
- Number of levels of spreaders
- 2
- Spreaders angle
- Swept-back
- Spars construction
- Aluminum spars
Southerly 480'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 25 it indicates a fast sailboat. - 210 ft²/T19.47 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. - 220
- Ballast ratioiThe 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. - 35 %
- Critical 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. - 8.77 knots
Southerly 480's auxiliary engine
- Engine(s)
- 1 inboard engine
- Engine(s) power
- 80 HP
- Fuel type
- Diesel
- Fuel tank capacity
- 175.4 gal664 liters
Southerly 480's accommodations and layout
- Cockpit
- Closed aft cockpit
- Cabin(s)
- 3
- Berth(s) (min./max.)
- 6 / 8
- Head(s)
- 2
- Freshwater tank capacity
- 106.5 gal403 liters
Discovery Yachts Group Southerly 480 - - 1/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 sailplan - - 2/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 layout - - 3/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 sailing - - 4/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 sailing - - 5/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 sailing - - 6/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 sailing - - 7/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 cockpit - - 8/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 interior and accommodations - - 9/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 interior and accommodations - - 10/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 interior and accommodations - - 11/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
Discovery Yachts Group Southerly 480 interior and accommodations - - 12/12
Picture extracted from the commercial documentation © Discovery Yachts Group
Picture extracted from the commercial documentation © Discovery Yachts Group
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