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Yachtsnet's archive of boat details and pictures
 

The following information and photographs are displayed as a service to anyone researching yacht types. HOWEVER THE PHOTOGRAPHS ARE COVERED BY COPYRIGHT, AND MAY NOT BE REPRODUCED WITHOUT THE PERMISSION OF YACHTSNET LTD. Details and photographs are normally based on one specific yacht, but could be a compilation. No reliance should be placed on other yachts of the same class being identical.  Where common variations exist, we have endeavoured to indicate this in these archive details.

Southerly 115 Mk I/II

Brief details

 

Builder

Northshore Ltd.

Northshore's Southerly's have found their own unique niche market as a comfortable cruising yacht with very shallow draught, yet surprisingly good performance. All feature deck saloons with an interior steering position, and a drop keel which when raised allows the boat to float in very shallow water.

LOA

36' 10"

Sail area

583 sq ft main and genoa

LWL

27' 6"

Rig

sloop

Beam

11' 11"

Cabins

3

Draught

2' 3" to 6' 8"

Berths

7/8

Displacement

14,600 lbs

Engine

Yanmar GM3 diesel

Ballast

6,978 lbs

BHP

35

Keel type

Iron drop keel inside iron bilge sole plate

Southerly 115

 

The first Southerly was the 28, designed by John Bennett and introduced in 1975. In 1978 Northshore commissioned Dick Carter to refine the concept, and the Southerly 100 was the result. In 1983 this was 'stretched' to create the Southerly 115 design, and the 115 remained in production to around 2007.

The late Dick Carter ran a US-based yacht design and production company called Carter Offshore, the staff of which included Doug Peterson, Chuck Paine, and Yves-Marie de Tanton, all of whom later went on to set up their own highly regarded design businesses. Carter Offshore mostly designed racing boats, some of them very successful indeed, including the drop keel "Red Rooster" which won the Fastnet Race in 1969.

The yacht illustrated here in most of the photos is believed to be one of the last of the Mk I versions - it having the hull, keel and rudder design of the Mk I but some of the Mk II features such as the interior steering by Autohelm. The Mk II has a drop keel redesigned by Rob Humphries and the single shallow rudder of the Mk I replaced with a twin rudder configuration. The Mk III has further minor alterations, primarily to the stern

Southerly 115

 

The accommodation starts with a forecabin with two over and under 78" length single berths, with lots of light and ventilation. There is dedicated storage above the berths for the extra leaf for the saloon table, and the cushion to convert the U-shaped dinette to a double berth.

 

Sailing performance on all the Southerly's has always been rated as quite good - indeed surprisingly so for such a high-volume hull with shallow draught. The one weakness of the single rudder versions is that control can be difficult offwind in big quartering seas, when the shallow rudder struggles to grip. Build quality from Northshore is excellent.

The plan here shows the triangular drop keel and single rudder of the Mk I Southerly 115s - the Mk II and III have a deeper drop keel and twin rudders, as seen here on Northshore's website

Southerly 115

Southerly 115

The saloon has the dinette to port and a single settee to starboard. The table slides up (or down) the compression post to make a berth, a dining area or up against the ceiling to open up the saloon for entertaining. A second leaf (stowed in the forecabin) can be added to make additional dining places. If used as a double berth the dinette forms a 76" by 46" berth.

Yachts seen here are no longer for sale - the data is online as a free information service for buyers researching boat types. THE PHOTOGRAPHS ARE COVERED BY COPYRIGHT, AND MAY NOT BE REPRODUCED WITHOUT THE PERMISSION OF YACHTSNET LTD.

Go to our brokerage section for boats currently for sale

 

To starboard by the companionway is the forward facing, sit-down interior helm and navigation station. Interior steering is by Autohelm control panel, rather than a wheel, which takes up too much space. To port is the L shaped galley, with gimbaled cooker, twin sinks, and refrigerated coolbox, again with plenty of storage, including cleverly designed secure plate racks. Headroom is just over six feet by the saloon table, increasing to about 6' 4" by the nav station and galley.

 

The galley is one of the best you will find on a boat of this size. The keel box forms the side of the galley furniture, and a clear panel in the aft end allows you to see the keel position - here the keel is half down, as shown by the blocks with the blue Spectra line being at the half-way mark

Aft of the interior steering/navigation position is the forward heads, with a Vaillant on-demand gas water heater for unlimited hot water

Aft of the galley is the passageway to the aft cabin, which also provides very good engine room access. To port of the passageway is the second heads compartment. The passageway to the aft cabin is fairly low, but once in the aft cabin the headroom is six feet.

The aft cabin has a large double berth with a teak lee board to starboard and a seat - which can also be used as a small berth - to port. There are both opening and non-opening ports and a large opening overhead hatch with a roll up sunscreen. There is plenty of room to get dressed, with lots of storage. The double berth is approx 78" by 52"

Yachts seen here are no longer for sale - the data is online as a free information service for buyers researching boat types. THE PHOTOGRAPHS ARE COVERED BY COPYRIGHT, AND MAY NOT BE REPRODUCED WITHOUT THE PERMISSION OF YACHTSNET LTD.

Go to our brokerage section for boats currently for sale

 

Engine access is good, from two large hatches in the passageway to the aft cabin, and also a removable panel under the companionway

Southerly 115

Yachts seen here are no longer for sale - the data is online as a free information service for buyers researching boat types. THE PHOTOGRAPHS ARE COVERED BY COPYRIGHT, AND MAY NOT BE REPRODUCED WITHOUT THE PERMISSION OF YACHTSNET LTD.

Go to our brokerage section for boats currently for sale

 

Southerly 115

All the Southerlys have fixed ballast in the form of a wide 'pancake' iron casting which acts as a grounding plate, through which drops an aerofoil section cast iron swing keel, which pivots on a stainless steel bearing, and is raised and lowered by a hydraulic ram - in all but a few early boats this is powered by an electrically driven pump, operated from the cockpit. There is though a hand operated back-up. The keel can be locked up or down. The photo at left shows the keel of a Mk I down with the yacht in slings

 

Southerly 115

 

The shallow rudder of these original generation Southerly 115s is well protected against grounding by a substantial skeg and heel plate. It does however give rise to the one criticism often made of Southerlies - that in a quartering sea the rudder fails to give enough control if the yacht is driven hard, and it is better to reef to reduce heel angles. The twin rudders on the Mk III were designed to improve this.

The later Southerly 115s had twin rudders generally similar to these rudders on a Southerly 110, and a redesigned and deeper lift keel

On the Southerly 115 the fixed ballast is of 4,962 lbs, and the swing keel 2,016 lbs. With keel down the draught is 6' 8" on the early triangular-keeled boats,a nd just over 8 ft on the later boats with keels as shown at right.

Despite this rather unconventional ballast arrangement, Southerly 115s are now rated as RCD Category A, and have a remarkably high AVS (angle of vanishing stability) of around 150 degrees - far better than many other more conventional yachts. This is largely due to the large deckhouse providing buoyancy (provided the windows remain intact) at very high heel angles

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