Fixed keel version available.
Swing keel weight: 120 kg / 264.55 lbs

Sail area:
-Main: 19.5 m² / 209.9 ft²
-Jib: 9.5 m² / 102.26 ft²
-Gennaker: 36 m² / 387.5 ft²
Ballast: 600 kg; Centerboard: 145 kg

Also know as the UNNA 24.
A fin keel was available. Draft: 1.3m
Sail area:
– Main: 13 m²
– Jib: 11 m²
– Gennaker: 25 m²

The first swing keel Southerly. Originally introduced as the Southerly 33, her name was changed soon after introduction.
Redeveloped into the Southerly 115 in 1984.

Developed from the Southerly 135 Mk1 with an extended stern and bow sprit allowing her to be rigged as a ketch.

LOD: 9.8m / 32.15 ft

Originally the 42. Rebranded the 420 after Concept yachts purchased the brand in 2023

Ballast weight: 2,100 kg / 4.630 lbs
Keel weight: 1,570 / 3,461 lbs
Total ballast: 3,670 kg / 8.091 lbs

Sail area:
-Main: 44 m² / 477 ft²
-Jib: 31 m² / 334 ft²
-Optional Code: 60 m² / 645 ft²

Also available with sloop or ketch rig.

Specs above are for aluminum hull with swing keel.
Available with fixed keel. Draft: 1.7m
– displacement: 13,800 kg
– ballast: 4,000 kg
Steel hull:
– Swing keel displacement: 15,000 kg
– Swing keel ballast: 4,000 kg
– Fixed keel displacement: 14,200 kg
– Fixed keel ballast: 3,700 kg
Sail area above = furling Genoa + main.
Furling Genoa = 70 m²
Main = 42 m²
Staysail or jib = 28 m²