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Sigma 36


ashore Hampshire


Marine Projects, Plymouth






36' 0"

Sail area

741 sq ft

Brief details


28' 9"



Yes - you can buy a typical Sigma 36 for a great deal less, but you would have to spend at least the same again to get either a Sigma 36 or 362 as comprehensively updated and well looked after as this one. Only in her second ownership, the present (marine engineer) owner has installed a new engine, a complete new rig with double-spreader mast, and lots more including updated electronics and a proper ram-drive below-decks autopilot. He is now aiming to downsize.


11' 6"




6' 1"




12,300 lbs


Beta 35 diesel


4,900 lbs



Keel type

Iron and lead fin keel and spade rudder


Following the considerable success of his one-design Sigma 33 cruiser-racer, introduced in 1978 as the first Sigma model, David Thomas designed the larger Sigma 36 in 1980/81 with the aim of repeating the success with a bigger version, though there was probably never any intention to market the 36 as a one-design racer.

The wide beam of the Sigma 36 gives spacious accommodation, including a large aft double berth under the cockpit. Like virtually all David Thomas designs, the Sigma 36 is close-winded and fast, yet is easy enough to handle and sail to make a good long-distance cruiser. 'Yachting Monthly' reviewed the design in 2001, commenting "....the Sigma 36 is beautiful to sail. There are not many yachts that can compare. She gives a huge feeling of security .... backed up by fabulous handling"

The Sigma 36 was later reworked into the Sigma 362 fast cruiser, with a detuned rig and a modified interior, with slightly larger heads and an aft cabin separated by a door. This yacht has been altered to have most of the cruising benefits of the 362, without the loss of performance of the smaller rig. The new rig (mast, boom etc. as well as sails) is double-spreader, meaning there is no need for runners, making it as easy to handle as the 362's masthead rig, possibly easier in fact as the headsail is smaller.

Ashore February 2020

Yachtsnet photographs February 2020

Ashore quarter
Go to selected larger photos



Most Sigma 36s have a babystay and runners supporting the single-spreader mast, and a inner supporting wire for the babystay running down to the forecabin floor.

This was one of the reasons the "cruising" 362 version had a smaller masthead rig, dispensing with runners and the under-deck staying for the babystay as found in most Sigma 36s.

The new twin-spreader rig fitted here retains all the power of the bigger rig and does not need either babystay or runners.

Forecabin berths
Saloon table

The saloon has 6' 1" headroom and two settee berths 6' 3" long, with pilot berths outboard.
As few people now cruise 36 ft yachts with 9 or 10 people aboard (as might have happened when racing)
the pilot berths for useful stowage - here cockpit cushions and a cockpit table are in them.

Saloon aft
Chart table
Bulkhead separating aft berth

As built the Sigma 36s had a single very long quarter berth to starboard aft of the chart table, the head of this berth forming the seat to the chart table. This was on racing boats traditionally the navigator's or skipper's berth.

Here a part bulkhead has been fitted, as shown in the photo at left, making a back for the chart table seat, and making a similar aft cabin layout (but without the actual door) to a Sigma 362.

The accommodation plan below shows the standard layout.

Accommodation plan
Aft cabin

The aft cabin has a seat (long enough to be a single berth if really needed) to starboard and
a large double under the cockpit sole. The double berth is 6' 8" long by 4' 6" wide
at the forward end, tapering slightly aft.

Aft double berth

The present owner installed the Beta 35 engine new in 2008, along with a new stainless steel fuel tank and other ancillaries. Engine hours are approx 600. The engine drives a 3-bladed Brunton Autoprop feathering prop with shaft drive and a dripless shaft seal.

Engine/gearbox and fuel tank
Autopilot ram drive

The hull topsides have the original gelcoat with - to quote a recent insurance survey -
"....no signs of any major damage or repair".

The survey also reported "..... The outer bottom laminates were tested for moisture content and the resulting readings were all in the dry scale but the rudder gave readings in the damp to low wet scale but this is normal".

Bow view

Yachtsnet photographs
February 2020

Early in the present ownership the keel was removed, and the internal
floor webs and GRP work strengthened before replacement.

Moored 2017

This yacht has been impressively well cared for over the years. Apart from things like a
tailored overall winter cover, details such as new modified stanchion support brackets
(stronger and stiffer than the original), anchor windlass and autopilot installation etc.,
have all been done very neatly.


Cockpit aft

The mast, boom, rod kicker, genoa furler and standing rigging were all new in 2009.
New self-tailing winches were installed in 2016. The sails (main, genoa and spinnaker)
were new in 2017, along with a new Raymarine Evolution under-deck ram-drive autopilot
and a Raymarine E7 plotter. A lot more has been done than we have mentioned!

Moored 2017

Now ashore in Hampshire for the winter under a tailored cover, this is a genuinely unique Sigma 36.
Starting with a lightly used one-owner example, the present owner has spent considerably more than the present asking price on upgrades, to produce a fast, easy to handle cruising yacht. In comparison to most modern production yachts, the Sigma will be faster and much nicer handling than all except
a few expensive marques such as Arconas, X-Yachts etc.


Engine details

Beta 35 1,498cc four-cylinder fresh water cooled diesel, Kanzaki gearbox, run approx 600 hours, shaft drive.

Fuel tank capacity

24 gallons in stainless steel tank


Three bladed Bruntons Autoprop


3 x 100AH AGM batteries, individually switched

Battery charging/electrics

100 amp engine alternator, with VSR to batteries. 7-stage automatic shorepower charger. Merlin Smartgauge battery monitor.

Sails and deck equipment

Rig details

Fractional sloop rig, Selden twin-spreader mast, boom, and rod kicker new 2009 with S/S standing rigging.


Rolly Tasker Sails - fully battened - new 2017


Rolly Tasker Sails - new 2017

Genoa furling

Furlex 200S - new 2009

Blade jib

Rolly Tasker Sails - new 2017


Rolly Tasker Sails - new 2017

Primary winches

2 x Lewmar 48 two-speed self-tailing - new 2016

Secondary winches

2 x Lewmar 16 self-tailing - new 2016

Halliard winches

2 x Lewmar 28 two-speed self-tailing - new 2016

Bower anchor

16 Kg Delta with 45 metres 8mm chain

Kedge anchors

Bruce with chain and warp

Anchor windlass

Lofrans X2 1000 watt electric windlass




Raymarine Evolution under deck ram-drive autopilot - new 2017

Steering compass

2 x Plastimo Contest bulkhead compasses.

Warps & fenders

4 warps and 5 fenders


Cockpit sprayhood, cockpit table, full tailored winter cover.

Navigation Equipment and instruments


Raymarine E7 with UK/Channel Navionics charting - new 2017. Also a legacy Raymarine RS300 standalone GPS

AIS transponder

Raymarine - displays on plotter. Also legacy NASA AIS receiver.


Brookes & Gatehouse Network

Depth sounder

Brookes & Gatehouse Network


Brookes & Gatehouse Network

VHF radio

NASA SX35 with DSC

Radio receiver

Pioneer radio/CD


NASA Clipper Navtex

Safety/emergency equipment


Seago 4-man valise, new 2017, serviced to April 2020


Horseshoe with danbuoy and floating light

Gas detector

Dual watch gas and carbon monoxide detector

Bilge pumps

2 manual pumps and electric pump


2 x fire extinguishers in cabin plus engine auto extinguisher


Cabin layout

Forecabin, heads, saloon and bulkhead-separated aft double

Cabin heating

Webasto hot air blown diesel heating



Water tank capacity

58 gallons


Plastimo Neptune 2000 two-burner, grill and oven


Coolbox with Penguin refrigeration unit



These particulars are believed to be correct but cannot be guaranteed and are subject to confirmation by the purchaser subject to still being available.

For further information or to arrange a viewing,

please contact Yachtsnet on 01326-212234


The particulars detailed herein are intended to give a fair description of the vessel but their accuracy cannot be guaranteed. These particulars are not a part of any contract or offer, and are supplied on the understanding that all negotiations shall be conducted via Yachtsnet Ltd., who are acting as brokers for the vendor. The vendor is not selling in the course of business unless otherwise stated. The prospective purchaser is strongly recommended to check the particulars, and where appropriate, at his own expense, to employ qualified agents to carry out surveys, structural and/or mechanical & electrical checks or tests

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