The Southerly 110 Sailboat
Specs & Key Performance Indicators

The Southerly 110, an aft-cockpit fractional sloop, was designed by Rob Humphreys and built in the UK by Northshore Yachts.

A Southerly 110 sailboat sailing on a broad reachA Southerly 110

Published Specification for the Southerly 110

Underwater Profile: Swing keel & skeg-supported rudder

Hull Material: GRP (Fibreglass)

Length Overall: 35'6" (10.8m)

Waterline Length: 30'3" (9.2m)

Beam: 11'9" (3.6m)

Draft: Max 7'2" (2.2m), Min 2'4" (0.7m)

Rig Type: Fractional sloop

Displacement: 15,388lb (6,980kg)

Designer: Rob Humphreys

Builder: Northshore Yachts (UK)

Year First Built: 1999


Published Design Ratios for the Southerly 110

1. Sail Area/Displacement Ratio: 15.1

  • Less than 16 would be considered under-powered;
  • 16 to 20 would indicate reasonably good performance;
  • Over 20 suggests relatively high performance.

2. Ballast/Displacement Ratio: 46.6

  • Under 40: less stiff, less powerful
  • Over 40: stiffer, more powerful

3. Displacement/Length Ratio: 248

  • Under 100: Ultralight
  • 100 to 200: Light
  • 200 to 275: Moderate
  • 275 to 350: Heavy
  • Over 350: Ultraheavy

4. Comfort Ratio: 28.2

  • Under 20 indicates a lightweight racing boat
  • 20 to 30 indicates a coastal cruiser
  • 30 to 40 indicates a moderate offshore cruising boat
  • 40 to 50 indicates a heavy offshore boat
  • Over 50 indicates an extremely heavy offshore boat

5. Capsize Screening Formula: 1.9

  • Under 2.0 (the lower the better): Better suited for ocean passages
  • Over 2.0: Less suited for ocean passages

read more about these Key Performance Indicators...


Summary Analysis of the Design Ratios for the Southerly 110

1. A Sail Area/Displacement Ratio of just 15.1 suggests that the Southerly 110 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.

2. A Ballast/Displacement Ratio of 46.6 means that the Southerly 110 will stand up well to her canvas in a blow, helping her to power through the waves.

3. A Displacement/Length Ratio of 248, tells us the Southerly 110 is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.

4. Ted Brewer's Comfort Ratio of 28.2 suggests that crew comfort of a Southerly 110 in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not encouraging news for anyone prone to

5. The Capsize Screening Formula (CSF) of 1.9 indicates that a Southerly 110 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0. 



Other sailboats in the Southerly range include:

Recent Articles

  1. A Hunter 356 Sailboat for Sale

    Mar 31, 23 08:51 AM

    'Exhibit A', a Hunter 356 is in great condition, having had many recent upgrades, and is ready for her new owner to step aboard and sail away

    Read More

  2. The True Cost of Boat Ownership

    Mar 28, 23 05:54 AM

    The true cost of boat ownership will almost certainly be more than what you originally thought it might be; the components of cost are...

    Read More

  3. Used Sailing Equipment For Sale

    Mar 28, 23 05:33 AM

    Here's where people with sailing equipment for sale advertise their stuff entirely free of charge. If you're looking for used sailing gear or other used boating accessories, here's where to find it!

    Read More