BoatsSoutherly 42RST

Southerly 42RST

Fractional Sloop · Swing Keel w/dual Rudders · First built 2007

A Rob Humphreys-designed fractional sloop featuring a swing keel and dual rudders for versatile shoal-water cruising

Designed by Rob Humphreys, built by Northshore Yachts.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Swing Keel w/dual Rudders

See her sail

The Southerly 42RST, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from Berthon International

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

Shoal draughtDraws 0.84 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her moderate displacement on a moderate beam gives 32 — a sea-kindly motion in a seaway.

Comfort ratio 32
CoastalBluewater

1.82 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.82
LightHeavy

229 — moderately heavy for her waterline, a balanced cruising weight.

Displacement / length 229
EasygoingPowered-up

15.0 — modest power for her weight; easygoing rather than lively, and happier with a breeze.

Sail area / displacement 15.0
TenderStiff

33% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 33%

A capable cruiser that sits just inside the offshore line — coastal work with real passages in her.

What the fleet has seen

The Southerly 42RST, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Southerly 42RST is a 12.9-meter fractional sloop designed by Rob Humphreys and built by Northshore Yachts from 2007.0:05 It features a swing keel and dual rudders, with a deck layout by Stephen Jones that includes twin wheels.0:37 The 2013 Southerly 42RST, hull number 46, has twin headsail furlers for a self-tacking inner jib and a larger genoa, electric winches, and a windlass controllable from the helm.1:40 Its cockpit seats up to 10 people and includes davits and a sugar-scoop bathing platform.3:28 Below deck, the two-cabin, two-head layout offers a forward VIP cabin and an aft master cabin with an island berth and en-suite wet room.5:43 The galley has a Corian worktop and a front-opening fridge.6:19 A raised chart table provides an internal watch-keeping station with autopilot controls and a chart plotter.5:04 The vessel is equipped with bow and stern thrusters, a generator, and an engine with approximately 1,300 hours.3:34

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen once across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

On the water

The Southerly 42RST on video

What they go for

Market signal

Where the fleet has seen this model come up for sale.

1seen for sale

From the fleet's own footage — our observed signal, not broker listings.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
32.6%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
15.0
Displacement / length
228.6
Comfort ratio
32.3
Capsize screening
1.82
Hull speed
8.1 kn
Pounds / inch immersion
1722
Hull
Hull type
Swing keel w/dual rudders
Construction
Fiberglass
Ballast type
Iron
Production
Years built
First built 2007
Designer
Rob Humphreys
Builder
Northshore Yachts

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Southerly 42012.86 mSame hull familyNear-identical lengthA Rob Humphreys-designed fractional sloop featuring a versatile swing keel that later evolved into the Southerly 430
[OFF MARKET] Southerly 420 “BLUE DOLPHIN” Yacht for Sale | The Famous Swing Keelfrom Berthon International
Alden Yachts 44 MII13.46 mSame hull family0.6 m longerAn evolution of the Alden 44 featuring a modified rudder, repositioned propeller, and updated interior layout
Jesse Terry // Sailing & Racing a Classic Wooden Boat3:20from 59° North Sailing
Ovni 43512.90 mSame hull familyNear-identical lengthA 12.9-metre aluminum cutter with a lifting keel, optimized for offshore stability and shoal-water exploration
Grounding on Aluminium Yachts 🔧 | Ask The Expert with NIGEL CALDER0:12from BoatHowTo
Southerly 135 MK 113.41 mSame hull family0.6 m longerA Dick Carter-designed masthead sloop featuring a versatile swing keel for deep-water performance and shoal-draft access
[OFF MARKET] Southerly 135 (YAHOOO) - Yacht for Sale - Berthon International Yacht Brokersfrom Berthon International
Southerly 3811.99 mSame hull family0.9 m shorterA 2008-launched fractional sloop with a 2.59-metre maximum draft that was later rebranded as the Southerly 390
[OFF MARKET] Southerly 38 “MOONDANCER” Yacht for Sale | A Delight to Sail13:14from Berthon International
Ovni 39512.83 mSame hull familyNear-identical lengthA Philippe Briand-designed aluminium lifting-keel cruiser built for go-anywhere exploration and shoal-water access
Our own used boat show at Håøyafrom SEILmagasinet

The family

Boats like this

Nearby designs by size, type, and era — worth a look alongside her.

Southerly 430A 12.86-metre evolution of the 420, pairing a deep 2.72-metre maximum draft with dual rudders for precise controlSoutherly 420A Rob Humphreys-designed fractional sloop featuring a versatile swing keel that later evolved into the Southerly 430Southerly 35RSA Rob Humphreys-designed swing keel cruiser built for shoal water access with a versatile fractional rigSoutherly 38A 2008-launched fractional sloop with a 2.59-metre maximum draft that was later rebranded as the Southerly 390Southerly 49A 15.11-metre performance cruiser featuring a Solent rig and a high sail-area-to-displacement ratio for spirited sailingSoutherly Yachts 470A 14.35-metre fractional sloop featuring a self-tacking jib and a swing keel for deep-water performance in shoal areas

Keep asking

The fleet has more to say

Search what's been said about the Southerly 42RST, or ask a specific question — the answer comes back written out, with links to the moments it draws on.

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